dumped dum·ped UK/dʌmpt/ US/ˈdʌmpt/ common adjective 1. that is dropped in a heap “his hastily dumped clothes” “the money was there, dumped all over the floor” WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.