/ɪˈrɛləvənt ˈwɪtnəs/ – Phrase
Definition: 1. nhân chứng cung cấp lời khai không liên quan đến vụ án;
2. lời khai của nhân chứng không liên quan đến vụ án.
A more thorough explanation: An irrelevant witness is a person who provides testimony or evidence that is not related to the matter at hand in a legal proceeding. This testimony or evidence does not have any bearing on the issues being considered by the court or tribunal and is therefore deemed irrelevant to the case.
Example: In a court case about a car accident, the judge ruled that the testimony of the neighbor who witnessed the argument between the driver and his wife before the accident was an irrelevant witness.