cluster

noun
clus·​ter | \ ˈklə-stər How to pronounce cluster (audio) \

Definition of cluster

 (Entry 1 of 2)

: a number of similar things that occur together: such as
a : two or more consecutive consonants or vowels in a segment of speech
b : a group of buildings and especially 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 the Perseus cluster of galaxies
d : a larger than expected number of cases of disease (such as leukemia) occurring in a particular locality, group of people, or period of time
e : a number of computers networked together in order to function as a single computing system Consisting of groups of inexpensive machines cobbled together, clusters in many ways have supplanted traditional supercomputers.— Elizabeth K. Wilson

cluster

verb
clustered; clustering\ ˈklə-​st(ə-​)riŋ How to pronounce clustering (audio) \

Definition of cluster (Entry 2 of 2)

transitive verb

1 : to collect into a cluster cluster the tents together
2 : to furnish with clusters the bridge was clustered with men and officers— Herman Wouk

intransitive verb

: to grow, assemble, or occur in a cluster they clustered around the fire

Keep scrolling for more

Other Words from cluster

Noun

clustery \ ˈklə-​st(ə-​)rē How to pronounce clustery (audio) \ adjective

Examples of cluster in a Sentence

Noun

a cluster of cottages along the shore A small cluster of people had gathered at the scene of the accident.

Verb

The children clustered around the storyteller. the mice clustered together into a small burrow
See More

Recent Examples on the Web: Noun

Aldebaran is actually much closer to Earth and not part of the cluster at all. Jennifer Ouellette, Ars Technica, "“Wolf’s jaw” star cluster may have inspired parts of Ragnarök myth," 16 Nov. 2018 This under-construction development Balaji is selling promises high-end living in Kensington, one of a cluster of flourishing, formerly industrial districts that have repackaged their gritty pasts for a new generation of buyers. Patrick Sisson, Curbed, "Booming postindustrial neighborhoods often overlook polluted past," 9 Oct. 2018 Possibly the most prominent change is Hanse’s reintroduction of clusters of smaller bunkers from Ross’ design. Joe Juliano, Philly.com, "Aronimink ready to show off restored course at September PGA event," 9 July 2018 Most can be turned on or off with a small row of buttons up on the left side of the gauge cluster. Andy Mikonis, chicagotribune.com, "Auto review: Mercedes-Benz S560 Cabriolet options over $150,000 of drop-top luxury," 13 June 2018 Residents of a cluster of riverside apartments are suing Goodwin College, contending the college breached agreements to keep rents affordable after buying the complex from the local housing authority. Jesse Leavenworth, Courant Community, "East Hartford Residents Sue Goodwin College Over Alleged Breach In Affordable Rent Agreement," 13 June 2018 That finale arrives on Friday and unpacks the fate of Wolfgang, a member of the cluster who has been kidnapped by an international organization. Andrew R. Chow, New York Times, "What’s on TV Friday: ‘Sense8’ and ‘Just Another Immigrant’," 8 June 2018 Back when the solar system was forming, our sun was part of closely packed star cluster, according to Helena Morais, researcher at Universidade Estadual Paulista in Brazil and co-author of the new study. Jason Daley, Smithsonian, "Is This Backwards-Orbiting Asteroid an Interstellar Visitor?," 23 May 2018 Did Biogen single-handedly lead to the creation of the Massachusetts biotech cluster? Scott Kirsner, BostonGlobe.com, "It’s kind of amazing that Biogen is here for its 40th anniversary," 18 May 2018

Recent Examples on the Web: Verb

Elsewhere, others were clustered together to delineate other obstacles to negotiate—a slalom course and so on. Jonathan M. Gitlin, Ars Technica, "Forget lap times; this car control class makes teen drivers safer," 6 Nov. 2018 The lines naturally cluster at the four points of the compass for American cities that are laid out on north-south/east-west grids. Martin Finucane, BostonGlobe.com, "Boston’s streets do go in all sorts of directions. These charts prove it," 12 July 2018 Her shirt, also white, featured rainbow embellishments that clustered near her right shoulder and left hip. Avery Matera, Teen Vogue, "Hailee Steinfeld Wears a Button-Down Shirt Dress on the Post-it Red Carpet in New York," 24 July 2018 Others cluster in bowls, baskets, terrariums, even under glass cake covers. Al Kemp, The Seattle Times, "How I came to grips with a downsized Christmas," 12 Dec. 2018 Democrats also won comfortably among independents, the ultimate swing voters who tend to cluster in the ideological middle. Gerald F. Seib, WSJ, "Democrats Built a Big Tent; Can They Keep It?," 12 Nov. 2018 Clearly inspired by last year’s Google Pixelbook, these machines are clustered in a lower (as in midrange) price band, apparently aimed at experienced Chromebook users who are ready for something better than the basic browser machines of yore. Melissa Riofrio, PCWorld, "The HP Chromebook x360 14 is a premium convertible missing one thing," 8 Oct. 2018 Many of England’s 500 vineyards are clustered in Kent and nearby Sussex, and a veritable wine-tasting circuit is taking shape, dotted with quintessential British pubs, farm-to-table restaurants, and stately homes. Tyler Wetherall, Condé Nast Traveler, "Kent Is Poised to Be the U.K.'s Napa Valley," 14 Sep. 2018 Centerpieces were clustered with delicate sprigs of pink sweet pea blooms that seemed to attract the crystal butterflies (Swarovski, of course) hovering nearby. Lilah Ramzi, Vogue, "At Austria’s Famous Salzburg Festival, the Hills Do Come Alive With the Sound of Music," 2 Aug. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cluster.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of cluster

Noun

before the 12th century, in the meaning defined above

Verb

14th century, in the meaning defined at transitive sense 1

History and Etymology for cluster

Noun and Verb

Middle English, from Old English clyster; akin to Old English clott clot

Keep scrolling for more

Learn More about cluster

Statistics for cluster

Last Updated

20 Mar 2019

Look-up Popularity

Time Traveler for cluster

The first known use of cluster was before the 12th century

See more words from the same century

Keep scrolling for more

More Definitions for cluster

cluster

noun

English Language Learners Definition of cluster

 (Entry 1 of 2)

: a group of things or people that are close together

cluster

verb

English Language Learners Definition of cluster (Entry 2 of 2)

: to come together to form a group

cluster

noun
clus·​ter | \ ˈklə-stər How to pronounce cluster (audio) \

Kids Definition of cluster

 (Entry 1 of 2)

: a number of similar things growing or grouped closely together : bunch a cluster of houses a flower cluster

cluster

verb
clustered; clustering

Kids Definition of cluster (Entry 2 of 2)

: to grow, collect, or assemble in a bunch

cluster

noun
clus·​ter | \ ˈkləs-tər How to pronounce cluster (audio) \

Medical Definition of cluster

: a larger than expected number of cases of disease (as leukemia) occurring in a particular locality, group of people, or period of time

Keep scrolling for more

Comments on cluster

What made you want to look up cluster? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to corrupt or become corrupted

Get Word of the Day daily email!

Test Your Vocabulary

A Green Quiz

  • shamrock
  • What is the best definition of green-eyed monster?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!