keep a rein on

idiom

Definition of keep a rein on

: to limit or control (something) We need to keep a rein on our spending. He keeps a tight rein on every part of the process.

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Cite this Entry

“Keep a rein on.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/keep%20a%20rein%20on. Accessed 22 Oct. 2021.

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