[clus.ter] n [ME, fr. OE clyster; akin to OE clott clot] (bef. 12c): a number of similar individuals that occur together: as a: two or more consecutive consonants or vowels in a segment of speech b: a group of buildings and esp. houses built close together on a sizable tract in order to preserve open spaces larger than the individual yard for common recreation c: an aggregation of stars or galaxies that appear close together in the sky and are gravitationally associated -- clus.tery adj
[2]cluster vb clus.tered ; clus.ter.ing vt (14c) 1: to collect into a cluster "~ the tents together"
2: to furnish with clusters ~ vi: to grow, assemble, or occur in a cluster