|1.||(often plural) 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.||a similar device used to control a very young child|
|3.||any form or means of control: to take up the reins of government|
|4.||the direction in which a rider turns (in phrases such as on a left (orright) rein, change the rein)|
|5.||something that restrains, controls, or guides|
|6.||give free rein, give a free rein to allow considerable freedom; remove restraints|
|7.||keep a tight rein on to control carefully; limit: we have to keep a tight rein on expenditure|
|8.||on a long rein with the reins held loosely so that the horse is relatively unconstrained|
|9.||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|
|10.||(tr) to check, restrain, hold back, or halt with or as if with reins|
|11.||to control or guide (a horse) with a rein or reins: they reined left|
The kidneys, loins, or lower back.
the kidneys, the supposed seat of the desires and affections; used metaphorically for "heart." The "reins" and the "heart" are often mentioned together, as denoting the whole moral constitution of man (Ps. 7:9; 16:7; 26:2; 139:13; Jer. 17:10, etc.).
see draw in the reins; free hand (rein) tight rein on.