(informal) Authority, as backing some statement, injunction, or command.

(idiomatic) Used to suggest an understatement.

(idiomatic) Clearly, obviously.

(literal sense) To wish someone farewell upon their leaving. / (idiomatic) To separate from someone or something.

present participle of nay-say

Negating; denial; the personality trait of contrariness.

(games) A children's game where players must carry out only those commands that are preceded by the utterance "Simon says".

(idiomatic, colloquial) "What did you say?" or "Repeat what you have said." A polite formula used when one has not heard or understood what has been said.

(idiomatic) To recite a prayer of invocation or thanksgiving at meal time.

(idiomatic, colloquial) What did you say?; Huh?; expresses incredulity.