1. One of a pair of long straps (usually connected to the bit or the headpiece) used to control a horse
   "The rider gently pulled on the reins to slow the horse"
    
2. Any means of control
   "he took up the reins of government"

1. Keep in check
   "The manager tried to rein in the project costs";
   - rule, harness
    
2. Control and direct with or as if by reins
   "rein a horse"; "The CEO drew rein on the company's excessive spending"; "The manager had to rein in the excessive spending";
   - harness, rein in, draw rein
    
3. 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";
   - rein in
    
4. Stop or check by or as if by a pull at the reins
   "He reined in his horses in front of the post office";
   - rein in

Sounds like: rain

Derived forms: reining, reins, reined

Type of: command, control, halt, hold back, keep, keep back, restrain, stop, strap

Part of: bridle

Encyclopedia: Rein, Paul