n.
1.one of a pair of long straps (usually connected to the bit or the headpiece) used to control a horse
2.any means of control rein v.
1.control and direct with or as if by reins
2.stop or slow up one's horse or oneself by or as if by pulling the reins
3.stop or check by or as if by a pull at the reins
4.keep in check
Idiom of the Day
fit (someone or something) in
to make time for someone or something
I try hard to fit some exercise in every morning.