释义 |
idiomkeep a tight rein on sb/sth(also keep sb/sth on a tight rein)to control someone or something very strictly:It is impossible to be competitive in business today without keeping a tight rein on costs.The regime's determination to keep a tight rein on dissent is indicated by the appointment of a hardline Chief of Police.The king kept his ministers on a tight rein, and did not allow them to initiate policy.
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