Tra từ rein - Từ điển Oxford Advanced Learner 8th

rein [rein reins reined reining] noun, verb BrE [reɪn] NAmE [reɪn]
noun
1. countable, usually plural a long narrow leather band that is attached to a metal bar in a horse's mouth (= a ↑bit ) and is held by the rider in order to control the horse
•She pulled gently on the reins.
2. reinsplural (BrE)strips of leather, etc. worn by a small child and held by an adult in order to stop the child from walking off and getting lost
3. the reinsplural the state of being in control or the leader of sth
•It was time to hand over the reins of power (= to give control to sb else).
•The vice-president was forced to take up the reins of office.
more at keep a tight rein on sb/sth at ↑tight

Word Origin:
Middle English: from Old French rene, based on Latin retinere ‘retain’.

Thesaurus:
rein noun C, usually pl.
•She pulled gently on the reins.
bridle • • halter • • harness • • tether • |especially AmE leash • |BrE lead •
pull on the reins/leash/lead
attach a halter/harness/leash/lead

Example Bank:
•He seized the reins of power.
•It's the Treasury that effectively holds the reins.
•It's the accountants who effectively hold the reins.
•Parents need to loosen the reins as the child grows.
•Sean gathered up the horse's reins.
•She had the horse on a long rein.
•She pulled sharply on the reins.
•He took the reins and walked the horse down the street.
•She jerked the reins and put the pony into a trot.
•Shorten your reins and lean forward more.
Idioms: ↑give free rein to something ▪ ↑give somebody free rein
Derived: ↑rein somebody back ▪ ↑rein something in

verb
Verb forms:

Word Origin:
Middle English: from Old French rene, based on Latin retinere ‘retain’.