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Definition of “rein” - English Dictionary

"rein" in American English

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reinnoun [C usually pl]

 us   /reɪn/
a long thin piece of material, esp. leather, used to control a horse
(Definition of rein from the Cambridge Academic Content Dictionary © Cambridge University Press)

"rein" in British English

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(Definition of rein from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

"rein" in Business English

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uk   us   /reɪn/
the reins [plural]
power and control of a business or other activity: These are the councillors who hold the reins of power. He handed the reins to his successor. I am retiring, and someone else can take over the reins.
free rein
the freedom to do what you want to do: have free rein We were told we had free rein on questions of design. give sb/sth free rein (to do sth) She was given free rein to make all the changes she wanted.
give/allow sth full rein (also give/allow full rein to sth)
to allow something to happen freely and completely: This is a post which will give your talents full rein. It's a task that requires you to allow full rein to your imagination.
keep a tight rein on sth
to control something very carefully: We need to keep a tight rein on the advertising budget.
(Definition of rein from the Cambridge Business English Dictionary © Cambridge University Press)
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“rein” in Business English

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