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English definition of “keep a tight rein on sb/sth”

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keep a tight rein on sb/sth

( also keep sb/sth on a tight rein)
to have a lot of control over someone or something: My father always kept us on a tight rein.
(Definition of keep a tight rein on sb/sth from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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