Emily Dickinson Lexicon

CLUS'TER, n. [Sax. cluster. It seems to be from the root of close, L. clausus, claustrum, claudo, a collecting or crowding together; Sw. klasa, a cluster of grapes; Dan. klase. The latter in orthography coincide nearly with class. In Welsh, clws is compact, neat; clysa, to make compact; clwys is a close.]

1. A bunch; a number of things of the same kind growing or joined together; a knot; as, a cluster of raisins.
2. A number of individuals or things collected or gathered into a close body; as, a cluster of bees; a cluster of people. – Milton. Dryden.
3. A number of things situated near each other; as, a cluster of governments in Italy. – J. Adams.