Meaning & Definition of Rein in English

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

• "He took up the reins of government"

1. Control and direct with or as if by reins

• "Rein a horse"

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"

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"

4. Keep in check

• "Rule one's temper"