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English definition of “rein sth in”

rein sth in

(ACTIVITY) (also rein sth back) phrasal verb with rein     /reɪn/ verb
to control an emotion, activity, or situation to prevent it from becoming too powerful: We tried to rein in our excitement and curiosity. Reports today suggest consumers are already reining back spending.Controlling and being in charge
(Definition of rein sth in (ACTIVITY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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