cluster

A group or bunch of several discrete items that are close to each other.

A number of individuals grouped together or collected in one place; a crowd; a mob.

(astronomy) A group of galaxies or stars that appear near each other.

(linguistics, education) A sequence of two or more words that occur in language with high frequency but are not idiomatic; a chunk, bundle, or lexical bundle.

(music) A secundal chord of three or more notes.

(phonetics) A group of consonants.

(computing) A group of computers that work together.

(computing) A logical data storage unit containing one or more physical sectors (see block).

(statistics, cluster analysis) A subset of a population whose members are sufficiently similar to each other and distinct from others as to be considered a distinct group; such a grouping in a set of observed data that is statistically significant.

(military) A set of bombs or mines released as part of the same blast.

(army) A small metal design that indicates that a medal has been awarded to the same person before.

(slang, euphemistic) A clusterfuck.

(chemistry) An ensemble of bound atoms or molecules, intermediate in size between a molecule and a bulk solid.