rein

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rein

1. one of a pair of long straps, usually connected together and made of leather, used to control a horse, running from the side of the bit or the headstall to the hand of the rider, driver, or trainer
2. the direction in which a rider turns (in phrases such as on a left (or right) rein, change the rein)
3. on a long rein with the reins held loosely so that the horse is relatively unconstrained
4. shorten the reins to take up the reins so that the distance between hand and bit is lessened, in order that the horse may be more collected
References in periodicals archive ?
In quick succession, the Department of Justice (DOJ) and Congress passed laws and regulations ostensibly designed to rein in terrorism.
Optimists thought that the reforms instituted to rein in government surveillance activities after the chaotic 1960s would permanently prevent the kind of harassment the I.N.S.