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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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