What is the definition of "testimony"?

The definition of "testimony" is accurately captured by the phrase "a formal statement given under oath." Testimony refers specifically to the evidence presented by a witness during legal proceedings, and it is vital that this statement is made under oath, ensuring the witness is legally bound to tell the truth. This formal requirement distinguishes testimony from casual or informal statements, making it a critical component in legal contexts, such as trials where the credibility and reliability of the evidence are essential for the court's decisions.

The other options do not reflect the legal definition of testimony. A public apology during a trial does not equate to the formal presentation of evidence. An informal expression of opinion lacks the structure and seriousness associated with formal legal testimonies. Lastly, a legal decision made by a jury pertains to the outcome of a trial rather than the evidence presented by witnesses. Thus, the focus on formality and the oath of truthfulness is what makes the definition of testimony stand out in legal terminology.