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Synonyms

rein in

British  

verb

  1. (adverb) to stop (a horse) by pulling on the reins

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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Amodei also said that any action to rein in AI should be done "without sacrificing commercial advantage".

From BBC Sep. 15, 2026

The United Nations rights chief called Monday for countries and "frontier" artificial intelligence companies to act urgently to rein in a technology he warned posed "unprecedented risks".

From Barron's Sep. 14, 2026

Efforts to rein in the power of Big Tech extend beyond concerns that TikTok, Instagram and other social media platforms are harming young children.

From Los Angeles Times Sep. 1, 2026

As the legislative session winds down, groups representing California counties, cities and school districts are pushing state lawmakers to rein in costs.

From The Wall Street Journal Aug. 27, 2026

Finally Baelish drew rein in front of a ramshackle building, three stories, timbered, its windows bright with lamplight in the gathering dusk.

From "A Game of Thrones" by George R.R. Martin

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