Meaning of “cluster” in the English Dictionary

"cluster" in British English

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clusternoun [ C ]

uk /ˈklʌs.tər/ us /ˈklʌs.tɚ/

[ + sing/pl verb ] a group of similar things that are close together, sometimes surrounding something:

Have a look at the cluster of galaxies in this photograph.
There was a cluster of fans around him, asking for autographs.

specialized phonetics a group of two or more consonant sounds that are together and have no vowel sound between them:

The /str/ at the beginning of "stray" is a cluster.
cluster
verb [ I ] uk us

People clustered around the noticeboard to read the exam results.

(Definition of “cluster” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"cluster" in American English

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clusterverb [ I ]

us /ˈklʌs·tər/

to form or gather together:

All his grandchildren clustered around him.

clusternoun [ C ]

us /ˈklʌs·tər/

a group of similar things growing or held together, or a group of people or things that are close together:

This section of town has a large cluster of fast-food restaurants.

(Definition of “cluster” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"cluster" in Business English

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clusternoun [ C ]

uk /ˈklʌstər/ us

a group of similar things that are close together in a small area:

There is a cluster of hi-tech businesses in the city's industrial park.

a group of similar events that happen within a small area or among a small group of people:

The study will look at an apparent cancer cluster among workers at the factory.

IT a group of computers connected together to work as one larger computer and to improve their performance

clusterverb [ I ]

uk /ˈklʌstər/ us

to happen a lot in the same small area or in the same way:

Most young firms tend to cluster in the finance, IT, telecoms, and retail industries.

to stand or be positioned close together in a group:

People clustered around the noticeboard to read the announcement.

(Definition of “cluster” from the Cambridge Business English Dictionary © Cambridge University Press)