rein
noun
1. one of a pair of long straps (usually connected to the bit or the headpiece) used to control a horse
Definition categories: man–made, strap
2. any means of control
- he took up the reins of government
verb
1. control and direct with or as if by reins
- rein a horse
Similar word(s): harness
Definition categories: social, command, control
2. 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
Definition categories: motion, halt, stop
3. stop or check by or as if by a pull at the reins
- He reined in his horses in front of the post office
Definition categories: motion, stop
4. keep in check