Definition of “cluster headache” - English Dictionary

british dictionary

“cluster headache” in British English

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cluster headachenoun [ C ]

uk /ˈklʌs.tə ˌhed.eɪk/ us /ˈklʌs.tɚ ˌhed.eɪk/ specialized

a very severe headache, affecting mainly one side of the head and happening several times within a period of time:

Cluster headaches are a lifelong condition for most sufferers.

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