To reply impertinently to (someone); to talk back.
To reply to a question from (someone) at a later time.
To issue echo characters, protocol responses, reflexive connection requests, etc.
To make a counterplay; to play in response.
To counter; to contrast or contradict.
A subversive style of gameplay in which a player attempts to overturn the usual rules and conventions of the game.
A game move made as a response.
A counterattack in a different part of the board.