1 overcome, conquer, vanquish, be victorious over, get the better of, beat, subdue, overwhelm, overpower, prevail over, triumph over, bring down, worst, thrash, rout, repulse, overthrow, trounce, whip, crush, destroy, do in, best:
The champion defeated the contender in a ten-round match.
2 thwart, frustrate, disappoint, check, balk, stop, terminate, end, finish, foil:
He never let his handicap defeat his hopes of winning.
3 conquest, overthrow, beating, repulse, trouncing, rout, vanquishment:
The defeat of our team must be charged to lack of training.
4 frustration, undoing, failure, miscarriage, set-back; Waterloo:
The stock market crash spelled the defeat of the company's plan for a share issue.