Meaning of “laborious” in the English Dictionary

"laborious" in British English

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laboriousadjective

uk /ləˈbɔː.ri.əs/ us /ləˈbɔːr.i.əs/

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

"laborious" in American English

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laboriousadjective

us /ləˈbɔr·i·əs, -ˈboʊr-/

needing a lot of time and effort:

a laborious task

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