tight rein on, a

Idioms

Strict control over, as in We told them to keep a tight rein on spending for the next year. This expression alludes to the narrow strap (rein) attached to a bit and used to control a horse's movements. Rein has been used to refer to any kind of restraint since the first half of the 1400s.

Example Sentences

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tight rein on, a

Scaramucci’s departure Monday is a good start, but Kelly will have to keep a tight rein on a White House staff that is used to few boundaries.

From Washington Post ● Jul. 31, 2017

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023