Court proceedings run on a specialized vocabulary, and a single unfamiliar word can leave you lost at the wrong moment. What follows is a plain-English guide to the common courtroom terms you’re most likely to hear, arranged in the order a case actually unfolds: the people in the room, what happens before trial, jury selection, the trial itself, the paperwork that drives everything, and how cases end.
Who’s Who in the Courtroom
The judge runs the proceeding. The judge decides legal questions, rules on what evidence the jury can hear, and in a bench trial (a trial without a jury) decides the outcome. In criminal cases the judge also handles sentencing. Attorneys address the judge as “Your Honor.”
The plaintiff (in civil cases) or the prosecution (in criminal cases) is the side bringing the action. A civil plaintiff claims to have suffered some kind of harm. In criminal court the government prosecutes through a district attorney or U.S. attorney. The defendant is the person or entity being sued or charged. In some family and immigration matters you’ll hear “petitioner” and “respondent” instead, but the roles are the same.
The bailiff is the uniformed officer who keeps order, protects the judge and jury, and escorts anyone in custody. The court clerk handles the paperwork of a proceeding: swearing in witnesses, managing exhibits, and maintaining official records. The court reporter sits near the witness stand and transcribes every word spoken on the record, producing the official written history of the case.
An expert witness is someone with specialized knowledge, training, or experience who testifies to help the jury understand technical evidence. Unlike an ordinary witness, an expert is allowed to offer opinions, but only after the judge decides that the expert’s methods and conclusions are reliable enough. A lay witness can only testify about things they personally observed.
If a criminal defendant cannot afford a lawyer, the court appoints one, a right guaranteed by the Sixth Amendment.1Library of Congress. U.S. Constitution – Sixth Amendment Depending on the jurisdiction, that attorney might be a public defender employed by a government office, a private attorney assigned from a list, or a lawyer working under contract with the court.
Pretrial Terms
An arraignment is typically the first court appearance in a criminal case. The defendant hears the formal charges, learns about their rights, and enters a plea — usually guilty, not guilty, or no contest.2United States Department of Justice. Initial Hearing / Arraignment The judge also decides at this stage whether the defendant will be held in custody or released.
Bail is money or security a criminal defendant posts to be released before trial. It’s meant to guarantee the person shows up for future court dates.3United States Courts. Glossary of Legal Terms A bond works similarly but often involves a bail bondsman who charges a nonrefundable fee (usually around 10 percent) to post the full amount on the defendant’s behalf. If the defendant skips court, the full amount is forfeited.
Discovery is the pretrial phase where both sides exchange information and evidence. Tools include written questions (interrogatories), document requests, and depositions. A deposition is an interview conducted under oath, usually in a lawyer’s office, where an attorney questions a witness and a court reporter records everything. Depositions lock down testimony so a witness cannot quietly change their story at trial.
A plea bargain is a negotiated deal in which the defendant agrees to plead guilty, often to a lesser charge, in exchange for a lighter sentence or the dismissal of other charges.4United States Department of Justice. Plea Bargaining Most criminal cases resolve this way and never reach trial.
A motion is a formal request asking the judge to do something specific: dismiss the case, exclude a piece of evidence, or compel the other side to turn over documents. Motions are usually filed in writing and supported by legal arguments. The judge grants or denies the motion, sometimes after hearing oral argument.
Jury Selection
Before a jury trial can begin, both sides help choose who sits in the box through a process called voir dire (pronounced “vwahr deer”). The judge and attorneys question a pool of prospective jurors about their backgrounds and potential biases to decide who can be fair.5United States Courts. Juror Selection Process
Attorneys can remove a prospective juror in two ways. A challenge for cause argues that a specific person cannot be impartial, for example because the juror knows one of the parties or has already formed an opinion. There is no limit on these challenges, but the judge must agree. A peremptory challenge lets an attorney strike a juror without giving any reason. Each side gets a limited number, and they cannot be used to remove jurors based on race or sex.
Trial Procedure and Evidence
Direct examination is when an attorney questions their own witness to build the facts of the case. Under the federal rules, attorneys generally cannot ask leading questions on direct, meaning they cannot phrase questions to suggest the answer they want.6Legal Information Institute. Federal Rules of Evidence Rule 611 – Mode and Order of Examining Witnesses and Presenting Evidence Cross-examination follows, where the opposing attorney does the opposite, asking pointed, leading questions designed to test credibility. The right to cross-examine is rooted in the Sixth Amendment’s guarantee that criminal defendants can confront their accusers.7Constitution Annotated. Amdt6.5.3.4 Right to Confront Witnesses Face-to-Face
Hearsay is one of the most frequently invoked rules of evidence. It refers to an out-of-court statement that someone tries to use in court to prove the thing the statement asserts. Federal Rule of Evidence 801 defines what counts as hearsay,8Legal Information Institute. Federal Rules of Evidence Rule 801 – Definitions That Apply to This Article; Exclusions From Hearsay and Rule 802 bars it from evidence unless a recognized exception applies.9Legal Information Institute. Federal Rules of Evidence Rule 802 – The Rule Against Hearsay Exceptions cover things like excited statements made during a startling event, business records, and statements by a party’s opponent. The rule exists because the jury cannot assess the credibility of someone who is not in the room to be questioned.
The burden of proof determines how much evidence a side needs to win. In criminal cases, the prosecution must prove guilt beyond a reasonable doubt, the highest standard in the legal system.10Constitution Annotated. Amdt14.S1.5.5.5 Guilt Beyond a Reasonable Doubt In most civil cases, the standard is a preponderance of the evidence, which essentially means “more likely than not.” Some civil matters, like fraud claims, use an intermediate standard called clear and convincing evidence.
An in camera review (Latin for “in a chamber”) happens when a judge privately examines sensitive materials, such as trade secrets, privileged communications, or sealed records, to decide what should be shared with the parties or the jury. The public and press are excluded.
A proffer is a preview of evidence. When a judge excludes testimony or a document, the attorney who wanted it admitted can tell the court on the record what the evidence would have shown. That does not change the ruling, but it preserves the issue for appeal.
Objections and Judicial Rulings
When an attorney believes the other side has broken a rule of evidence or procedure, they raise an objection. The judge responds with one of two words. Sustained means the judge agrees; the attorney may have to rephrase the question, move on, or the answer may be stricken from the record. Overruled means the judge disagrees, and the questioning continues.
A sidebar is a brief private conversation at the judge’s bench between the judge and the attorneys, held out of the jury’s earshot. Sidebars come up when an issue is too sensitive or complex to hash out in front of the jury.
Legal Filings and Documents
A summons is the official notice telling a defendant that a lawsuit has been filed and requiring them to respond. It usually arrives alongside a complaint, which lays out the plaintiff’s version of events and the legal claims being made. In federal court, a defendant generally has 21 days after being served to file a response.11Legal Information Institute. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections: When and How Presented State courts set their own deadlines. Ignoring a summons and complaint can produce a default judgment, meaning the plaintiff wins automatically because the defendant never showed up to contest the claims.12Legal Information Institute. Federal Rules of Civil Procedure Rule 55 – Default; Default Judgment
A subpoena is a court order that compels a person to testify or produce documents, electronic records, or other tangible evidence.13Legal Information Institute. Federal Rules of Civil Procedure Rule 45 – Subpoena Ignoring one can result in sanctions, including fines and potential jail time for contempt. A subpoena duces tecum specifically demands documents or physical evidence rather than live testimony.
A brief is a written argument submitted to the court, laying out the legal reasoning and citing case law to support a party’s position. Despite the name, briefs can be quite long. Attorneys file them in support of motions, at trial, and especially on appeal, where the entire case is argued on paper.
An affidavit is a written statement of facts sworn under oath, typically signed in front of a notary. A declaration serves the same purpose but substitutes a statement that the signer is making the claims under penalty of perjury. Both are used to present facts to the court without live testimony.
An injunction is a court order that commands someone to do something or, more often, to stop doing something. A temporary restraining order (TRO) is a short-term emergency injunction issued before the court has time for a full hearing, designed to prevent immediate harm. A gag order restricts what attorneys, parties, or witnesses can say publicly about a pending case, typically to protect the defendant’s right to a fair trial from pretrial publicity.
Verdicts, Sentencing, and Appeals
A verdict is the jury’s decision. In a criminal trial it determines whether the defendant is guilty or not guilty; in a civil trial it determines which side prevails and often the amount of damages. An acquittal is a verdict or judicial finding that the defendant is not guilty. Because of double jeopardy protections, the government cannot retry someone after an acquittal.3United States Courts. Glossary of Legal Terms
A mistrial occurs when a fundamental error makes the trial invalid: a juror is caught researching the case online, a witness blurts out highly prejudicial information, or the jury cannot reach a unanimous verdict (a hung jury).3United States Courts. Glossary of Legal Terms After a mistrial, the case can often be retried from scratch.
At sentencing, the judge determines the punishment for a guilty defendant. Common terms include probation (supervised release instead of jail, with conditions the defendant must follow), restitution (money the defendant must pay to compensate the victim), and concurrent versus consecutive sentences. Concurrent sentences run at the same time; two five-year terms served concurrently means five years total. Consecutive sentences stack, so the same two terms run to ten.
An appeal asks a higher court to review the trial court’s legal decisions. Appeals are not retrials. The appellate court does not hear new evidence or call witnesses; it reads the briefs, reviews the transcript, and decides whether the lower court got the law right. Three outcomes are possible. If the court affirms, the original result stands. If it reverses, the winner below becomes the loser. If it remands, the case goes back to the trial court for further proceedings consistent with the appellate court’s instructions.
Courtroom Conduct
A person appearing pro se (pronounced “pro say”) is representing themselves without an attorney. Courts allow this in both civil and criminal cases, but the pro se party is held to the same procedural rules as a licensed lawyer. Judges will not coach them. Most self-represented litigants get into trouble not with the substance of their case but with missed deadlines, improper filings, and procedural missteps that can be fatal to an otherwise valid claim.
Contempt of court is conduct that defies the court’s authority or disrupts its proceedings. Direct contempt happens in the judge’s presence, such as shouting, refusing to answer questions, or openly defying an order, and the judge can impose sanctions immediately. Indirect contempt happens outside the courtroom, such as violating a court order or ignoring a subpoena. Federal law authorizes fines and imprisonment for contempt, with criminal contempt carrying up to six months in jail in many cases.14Office of the Law Revision Counsel. 18 U.S. Code 402 – Contempts Constituting Crimes