Yes /yes/ adverb 1. used to express affirmation or assent or to mark the addition of something emphasizing and amplifying a previous statement 2. used to express an emphatic contradiction of a previously negative statement or command 3. used, usually interrogatively, to express hesitation, uncertainty, curiosity, etc. 4. used to express polite or minimal interest or attention noun, plural - yeses 5. an affirmative reply verb (used with object) - yessed, yessing 6. to give an affirmative reply to; give assent or approval to interjection 7.used as a strong expression of joy, pleasure, or approval -synonyms: all right, alright, aye (also ay), exactly, OK (or okay), okeydoke (or okeydokey), yea, yeah, yep, yo -antonyms: nay, no, no way, scarcely