(plump) adjective
Swelled out or enlarged to the full; somewhat fat. See synonyms under ROUND¹.
—v.t. & v.i. To make or become plump: often with up or out.
—noun Archaic A closely united group; a cluster or clump. [<MDu. plomp]
—plump′ly adverb
—plump′·ness noun

(plump) v.i.
1. To fall suddenly or heavily; drop with full impact.
2. To give one's complete support: with for.
—v.t.
3. To drop or throw down heavily or all at once.
4. To utter bluntly or abruptly: often with out.
—noun The act of plumping or falling; the sound made by the impact of a falling object.
—adjective Containing no reservation or qualification; blunt; downright.
—adverb
1. With a sudden impact or fall into or as into water; in a sudden or forcible manner; also, unexpectedly.
2. Directly; without hesitation, circumlocution, or qualification; bluntly. [<MDu. plompen]
—plump′ly adverb