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cluster.

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

7 characters2 syllables approx.English language

Meaning & usage

noun/ˈklʌstə/Received-Pronunciation/ˈklʌstɚ/General-American
  1. A bunch or group of several discrete items that are close to each other.

    a cluster of islands
    A cluster of flowers grew in the pot.
  2. A bunch or group of several discrete items that are close to each other. A group of galaxies, nebulae, or stars that appear to the naked eye to be near each other.

    The Pleiades cluster contains seven bright stars.
  3. A bunch or group of several discrete items that are close to each other. An ensemble of bound atoms (especially of a metal) or molecules, intermediate in size between a molecule and a bulk solid.

    physical
  4. A bunch or group of several discrete items that are close to each other. A group of computers that work together.

  5. A bunch or group of several discrete items that are close to each other. A logical data storage unit containing one or more physical sectors (see block (noun)).

  6. A bunch or group of several discrete items that are close to each other. A group of cases of the same disease occurring around the same place or time.

    A leukemia cluster has developed in the town.
  7. A bunch or group of several discrete items that are close to each other. Synonym of lexical bundle (“a sequence of two or more words that occur in a language with high frequency but are not idiomatic”).

    examples of clusters would include in accordance with, so far, and the results of
  8. A bunch or group of several discrete items that are close to each other. A set of bombs or mines released as part of the same blast.

  9. A bunch or group of several discrete items that are close to each other. In full oak leaf cluster: a small bronze or silver device shaped like a twig of oak leaves and acorns which is worn on a ribbon to indicate that the wearer has been conferred the same award or decoration before; an oakleaf.

    US
  10. A bunch or group of several discrete items that are close to each other. A secundal chord of three or more notes.

  11. A bunch or group of several discrete items that are close to each other. A pronounceable group of consonants that occur together: a consonant cluster.

    The word scrub begins with a cluster of three consonants.
  12. A bunch or group of several discrete items that are close to each other. In cluster analysis: a subset of a population whose members are similar enough to each other and distinct from others as to be considered a separate group; also, such a grouping in a set of observed data that is statistically significant.

  13. A number of individuals (animals or people) collected in one place or grouped together; a crowd, a mob, a swarm.

  14. Euphemistic form of clusterfuck (“a chaotic situation where everything seems to go wrong”).

    euphemistic · form-of · slang
Where this word comes from

The noun is derived from Middle English cluster (“bunch, cluster, spray; compact body or mass, ball”) [and other forms], from Old English cluster, clyster (“cluster, bunch, branch”), from Proto-Germanic *klas-, *klus- (“to clump, lump together”) (possibly from Proto-Indo-European *gel- (“to ball up; to clench; to amass”)) + *-þrą (suffix forming nouns denoting an instrument or tool). The English word is probably a doublet of clot. The verb is derived from the noun. Cognates * Dutch klister (“cluster”) (dialectal) * Icelandic klasi (“cluster; bunch of grapes”) * Low German Kluuster (“cluster”) * Swedish kluster (“cluster”)

verb/ˈklʌstə/Received-Pronunciation/ˈklʌstɚ/General-American
  1. To collect (animals, people, objects, data points, etc) into clusters (noun sense 1).

    transitive
  2. To cover (with clusters); to scatter or strew in clusters (within); to distribute (objects) within such that they form clusters.

    transitive
    The sea is clustered with islands.
  3. To form a cluster or group; to assemble, to gather.

    intransitive
    The children clustered around the puppy.
Where this word comes from

The noun is derived from Middle English cluster (“bunch, cluster, spray; compact body or mass, ball”) [and other forms], from Old English cluster, clyster (“cluster, bunch, branch”), from Proto-Germanic *klas-, *klus- (“to clump, lump together”) (possibly from Proto-Indo-European *gel- (“to ball up; to clench; to amass”)) + *-þrą (suffix forming nouns denoting an instrument or tool). The English word is probably a doublet of clot. The verb is derived from the noun. Cognates * Dutch klister (“cluster”) (dialectal) * Icelandic klasi (“cluster; bunch of grapes”) * Low German Kluuster (“cluster”) * Swedish kluster (“cluster”)

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.