[yes] adv [ME, fr. OE gese] (bef. 12c) 1--used as a function word to express assent or agreement "are you ready? Yes, I am" 2--used as a function word usu. to introduce correction or contradiction of a negative assertion or direction "don't say that] Yes, I will" 3--used as a function word to introduce a more emphatic or explicit phrase 4--used as a function word to indicate uncertainty or polite interest or attentiveness
[2]yes n (1712): an affirmative reply: yea