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English definition of “the thin end of the wedge”

the thin end of the wedge

UK
the start of a harmful development: Identity cards for students could be the thin end of the wedge - soon everyone might have to carry identification.Beginnings and starts
(Definition of the thin end of the wedge from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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Translations of “the thin end of the wedge”

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