Voir Dire
in law, a preliminary examination of a witness to ascertain whether he is competent. When a witness is supposed to have an interest in the cause, the party against whom he is called has the choice to prove such interest by calling another witness to that fact, or he may require the witness produced to be sworn on his voir dire, as to whether he has an interest in the case or not, but the party against whom he is called will not be allowed to have recourse to both methods to prove the witness' interest. If the witness answers he has no interest, he is competent, his oath being conclusive; if he swears he has an interest, he will be rejected.