what for adverb 2noun 1forms 1 adverb2 •For what purpose.What is this tool for?That's what friends are for. •(informal) For what reason; why.He wants four copies of it? What for?Ow! What did you do that for? noun1 •(informal) An unspecified punishment or rebuke.When your dad gets home, he'll give you (a) what for. formswhat fors
