- plumpplump1 [plump]adj.[LME < MDu plomp, unwieldy, bulky, dull: orig. echoic]full and rounded in form; chubbyvt., vi.to make plump; fill out: sometimes with up or outplumpishadj.plumplyadv.plumpnessn.plump2 [plump]vi.[ME plumpen < MDu plompen: orig. echoic]1. to fall suddenly or with full impact2. to come in contact abruptly or heavily (against something)3. [Chiefly Brit.] to vote or opt ( for someone or something)4. to offer strong support (for someone or something)vt.to drop, throw, or put down heavily or all at oncen.1. a falling, plunging, or colliding suddenly or heavily2. the sound of thisadv.1. with a plump; suddenly; heavily2. straight down3. in plain words; bluntlyadj.blunt; directplump3 [plump]n.[see PLUMP2, vi. & CLUMP] [Now Dial., Chiefly Brit.] a compact group; cluster
English World dictionary. V. Neufeldt. 2014.