Definition of why:
- A young heifer.
- For what cause, reason, or purpose; on what account; wherefore; - used interrogatively. See the Note under What, pron., 1.
- For which; on account of which; - used relatively.
- The reason or cause for which; that on account of which; on what account; as, I know not why he left town so suddenly; - used as a compound relative.
how, puzzlement, end, puzzle, design, intention, riddle, justification, cause, purpose, what has/will become of, objective, kindly, occasion, target, mark, do you mind?, ambition, keep, grounds, goal, aim, closed book, do with, call, proof, what's gotten into someone?, motive, intent, mystification, who asked you?, meaning, account, suit yourself, point, where has someone/something gotten to?, necessity, planned, reason, wherefore, start, what (has) happened to something, get lost, authority, ground, subject, secret, view, anyway, how come, head-scratcher, enigma, just, object, conundrum, argument.