Full and well-rounded; hence,of a person, fleshy; fat; chubby: as, a plump figure; a plump habit of body; of things, filled out and distended; rounded: as, a plump seed.Figuratively, round; fat; large; full.Dry; hard.n. A knot; a cluster; a group; a clump; a number of persons, animals, or things closely united or standing together; a covey.To grow plump; enlarge to fullness; swell.To make plump, full, or distended; extend to fullness; dilate; fatten.To plunge or fall like a heavy mass or lump of dead matter; fall suddenly.To vote for a single candidate, when one has the right to vote for two or moreTo cause to fall suddenly and heavily: as, to plump a stone into waterAt once, as with a sudden heavy fall; suddenly; heavily; without warning or preparation; very unexpectedly; downright; right.Blunt; downright; unreserved; unqualified: as, a plump lie.n. A sudden heavy downfall of rain.