PLUMP, adjective

1. Full; swelled with fat or flesh to the full size; fat; having a full skin; round; as a plump boy; a plump habit of body.

The famish'd crow grows plump and round.

2. Full; blunt; unreserved; unqualified; as a plump lie.

PLUMP, noun A knot; a cluster; a clump; a number of things closely united or standing together; as a plump of trees; a plump of fowls; a plump of horsemen.

[This word is not now used in this sense, but the use of it formerly, is good evidence that plump is clump, with a different prefix, and both are radically one word with lump. Plumb, Latin plumbum, is the same word, a lump or mass.

PLUMP, verb transitive [from the adjective.] To swell; to extend to fullness; to dilate; to fatten.

The particles of air expanding themselves, plump out the sides of the bladder.

A wedding at our house will plump me up with good cheer.

PLUMP, verb intransitive

1. To plunge or fall like a heavy mass or lump of dead matter; to fall suddenly or at once.

2. To enlarge to fullness; to be swelled.

PLUMP, adverb Suddenly; heavily; at once, or with a sudden heavy fall.