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Definition watertight in British English

watertight adjective

adjective
/ˈwɔːtə(r)ˌtaɪt/
1

a watertight container or room is made so that water cannot enter it

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2

something that is watertight such as an excuse, argument, case, or alibi is so good that no one can find anything wrong with it

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Definition watertight in British English