#1 rein n. one of a pair of long straps (usually connected to the bit or the headpiece) used to control a horse. wn
#2 rein v. [harness, rein in, draw rein] control and direct with or as if by reins; "rein a horse". wn
#3 rein n. any means of control; "he took up the reins of government". wn
#4 rein v. [rein in] stop or slow up one's horse or oneself by or as if by pulling the reins; "They reined in in front of the post office". wn
#5 rein v. [rein in] stop or check by or as if by a pull at the reins; "He reined in his horses in front of the post office". wn
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