Meaning of “temperamental” in the English Dictionary

"temperamental" in British English

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temperamentaladjective

uk /ˌtem.pər.əˈmen.təl/ /ˌtem.prəˈmen.təl/ us /ˌtem.pɚ.əˈmen.t̬əl/
temperamentally
adverb uk /ˌtem.pər.əˈmen.təl.i/ /ˌtem.prəˈmen.təl.i/ us /ˌtem.pɚ.əˈmen.t̬əl.i/

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

"temperamental" in American English

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temperamentaladjective [ not gradable ]

us /ˌtem·prəˈmen·təl/

expressive of your emotional character:

a temperamental young man

If a machine is temperamental, it sometimes works and sometimes does not:

Our VCR can be temperamental.

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