WordWeb Online

1. Beat thoroughly and conclusively in a competition or fight
   "We trounced the other team on Sunday!";
   - cream [informal], bat, clobber [informal], drub, thrash [informal], lick [informal], marmalise [Brit, informal], marmelize [Brit, informal], marmelise [Brit, informal], wipe the floor [informal], paste [informal], beat hollow [informal], whale [N. Amer, informal], marmalize [Brit, informal], smoke [N. Amer, informal], hammer [informal], muller [Brit, informal], blow away [informal], slaughter [informal], tromp [N. Amer, informal]
    
2. Come out better in a competition, race, or conflict
   - beat, beat out, crush, shell, vanquish
    
3. Censure severely or angrily
   "The deputy trounced the Prime Minister";
   - call on the carpet [US, informal], take to task, rebuke, rag [informal], lecture, reprimand, jaw [informal], dress down [informal], call down [informal], scold, chide, berate, bawl out [informal], remonstrate, chew out [N. Amer, informal], chew up [N. Amer, informal], have words, lambaste, lambast, ream [N. Amer, informal], wig [Brit, informal]
    
4. Beat severely with a whip or rod
   "The children were severely trounced";
   - flog, welt, whip, lather, lash, slash, strap, whale [N. Amer, informal]

Derived forms: trouncing, trounces, trounced

Type of: beat, beat up, criticise [Brit], criticize, damn [informal], defeat, get the better of, knock [informal], overcome, pick apart, work over