rein in

Verb	1.	rein in - 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" Synonyms: rein
	2.	rein in - control and direct with or as if by reins; "rein a horse" Synonyms: draw rein, rein, harness
	3.	rein in - stop or check by or as if by a pull at the reins; "He reined in his horses in front of the post office" Synonyms: rein

command, control, draw rein, harness, rein