Definition of “lengthy” - English Dictionary

british dictionary

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

“lengthy” in American English

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lengthyadjective [ -er/-est only ]

us /ˈleŋk·θi, ˈleŋ-/

lengthy adjective [ -er/-est only ] (TIME)

taking a long time:

a lengthy speech

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