—adv. 1. (used to express affirmation or assent or to mark the addition of something emphasizing and amplifying a previous statement): Do you want that? Yes, I do. 2. (used to express an emphatic contradiction of a previously negative statement or command): Don't do that! Oh, yes I will! 3. (used, usually interrogatively, to express hesitation, uncertainty, curiosity, etc.): “Yes?” he said as he opened the door. That was a marvelous show! Yes? 4. (used to express polite or minimal interest or attention.)
—n. an affirmative reply.
—v.t. to give an affirmative reply to; give assent or approval to.