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English definition of “watertight”

watertight

adjective uk   /ˈwɔː.tə.taɪt/ us    /ˈwɑː.t̬ɚ-/

watertight adjective (NO WATER)

having no openings to allow water to get in: They're doing some repairs to make the roof more watertight.

watertight adjective (NO DOUBTS)

(of a theory, plan, or agreement) formed very carefully in every detail so that nothing is uncertain or in doubt: This book is designed to be provocative rather than a watertight piece of economic analysis.

watertight adjective (NO GOALS)

If a football team has a watertight defence, it stops an opponent from scoring a goal. : Rovers defence wil need to be watertight in their Carling Cup clash with Watford.
(Definition of watertight from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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