rein in
phrasal verb
reined in; reining in; reins in
1
: to limit or control (someone or something)
Congress must rein in spending.
You had better rein that kid in before she gets hurt.
2
: to make (an animal) stop by using reins
The rider reined in his horse.
Examples of rein in in a Sentence
Recent Examples on the Web
One recent preprint estimated that across the many drains that the virus can put on medical systems, public-health responders, and economic productivity, an average measles outbreak can cost more than $750,000 to rein in.
—
Katherine J. Wu, The Atlantic, 18 Dec. 2025
The bill would also rein in pharmacy benefit managers — middlemen that manage drug costs and process insurance claims.
—Joey Cappelletti, Fortune, 18 Dec. 2025
Trump is trying to avoid an open fight with Republicans who want to rein in the titans of AI by reaching out to GOP lawmakers to make the argument that state regulation of the industry could cripple its growth.
—Alexander Bolton, The Hill, 16 Dec. 2025
Whether the world ends up witnessing the deaths of 2,000 or 4,000 glaciers a year is all about how much is done to rein in global heating.
—Laura Paddison, CNN Money, 15 Dec. 2025
See All Example Sentences for rein in
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Katherine J. Wu, The Atlantic, 18 Dec. 2025
The bill would also rein in pharmacy benefit managers — middlemen that manage drug costs and process insurance claims.
—Joey Cappelletti, Fortune, 18 Dec. 2025
Trump is trying to avoid an open fight with Republicans who want to rein in the titans of AI by reaching out to GOP lawmakers to make the argument that state regulation of the industry could cripple its growth.
—Alexander Bolton, The Hill, 16 Dec. 2025
Whether the world ends up witnessing the deaths of 2,000 or 4,000 glaciers a year is all about how much is done to rein in global heating.
—Laura Paddison, CNN Money, 15 Dec. 2025
See All Example Sentences for rein in
Cite this Entry
“Rein in.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rein%20in. Accessed 21 Dec. 2025.
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