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Verb: rein in
  1. (driving) 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
     
  2. Control and direct with or as if by reins
    "rein in a horse";
    - harness, draw rein, rein
     
  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";
    - rein

Derived forms: reining in, reined in, reins in

Type of: command, control, halt, stop

Encyclopedia: Rein in