Definition of “drainage” - English Dictionary

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“drainage” in British English

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

“drainage” in American English

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drainagenoun [ U ]

us /ˈdreɪ·nɪdʒ/

the process by which water or other liquids flow away into pipes or into the ground:

The swamp has poor drainage throughout.

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