Emily Dickinson Lexicon

PLUMP, n.

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. – Bacon. Hayward. Dryden. [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, L. plumbum, is the same word, a lump or mass.]