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A cluster of mushrooms.
A star cluster


From Middle English cluster, from Old English cluster, clyster ‎(cluster, bunch, branch), from Proto-Germanic *klus-, *klas- ‎(to clump, lump together) + Proto-Germanic *-þrą ‎(instrumental suffix), related to Low German Kluuster ‎(cluster), Dutch dialectal klister ‎(cluster), Swedish kluster ‎(cluster), Icelandic klasi ‎(cluster; bunch of grapes).



cluster ‎(plural clusters)

  1. A group or bunch of several discrete items that are close to each other.
    a cluster of islands
    • Spenser
      Her deeds were like great clusters of ripe grapes, / Which load the bunches of the fruitful vine.
    • 1907, Harold Bindloss, chapter 7, The Dust of Conflict:
      Then there was no more cover, for they straggled out, not in ranks but clusters, from among orange trees and tall, flowering shrubs [] ,
    • 2011 December 29, Keith Jackson, “SPL: Celtic 1 Rangers 0”, Daily Record:
      Charlie Mulgrew’s delicious deadball delivery was attacked by a cluster of green and white shirts at McGregor’s back post but Ledley got up higher and with more purpose than anyone else to thump a header home from five yards.
    • 2013 May-June, William E. Conner, “An Acoustic Arms Race”, American Scientist, volume 101, number 3, page 206-7: 
      Earless ghost swift moths become “invisible” to echolocating bats by forming mating clusters close (less than half a meter) above vegetation and effectively blending into the clutter of echoes that the bat receives from the leaves and stems around them.
    A cluster of flowers grew in the pot.
  2. A number of individuals grouped together or collected in one place; a crowd; a mob.
    • Milton
      As bees [] / Pour forth their populous youth about the hive / In clusters.
    • Shakespeare
      We loved him; but, like beasts / And cowardly nobles, gave way unto your clusters, / Who did hoot him out o' the city.
  3. (astronomy) A group of galaxies or stars that appear near each other.
    The Pleiades cluster contains seven bright stars.
  4. (music) A secundal chord of three or more notes.
  5. (phonetics) A group of consonants.
    The word "scrub" begins with a cluster of three consonants.
  6. (computing) A group of computers that work together.
  7. (computing) A logical data storage unit containing one or more physical sectors (see block).
  8. (statistics) A significant subset within a population.
  9. (military) Set of bombs or mines.
  10. (army) A small metal design that indicates that a medal has been awarded to the same person before.
  11. (chemistry) An ensemble of bound atoms or molecules, intermediate in size between a molecule and a bulk solid.

Derived terms[edit]


The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Help:How to check translations.


cluster ‎(third-person singular simple present clusters, present participle clustering, simple past and past participle clustered)

  1. (intransitive) To form a cluster or group.
    The children clustered around the puppy.
    • Tennyson
      His sunny hair / Cluster'd about his temples, like a god's.
    • Foxe
      the princes of the country clustering together
    • 1997, Lynn Keller, Forms of Expansion: Recent Long Poems by Women, University of Chicago Press, ISBN 0226429709, chapter 6, page 281:
      On the page, “Me” is irregular but—except for a prominent drawing of a two-toned hieroglyphic eye—not radically unusual: the lines are consistently left-justified; their length varies from one to a dozen syllables; they cluster in stanzalike units anywhere from one to six lines long that are separated by consistent spaces.





Borrowing from English cluster


  • Hyphenation: clus‧ter


cluster f, m, m ‎(plural clusters, diminutive clustertje n)

  1. cluster



cluster m (plural clusters)

  1. (music) cluster (chord of three or more notes)
  2. (computing) cluster (group of computers working concurrently)