as in to contain
to keep from exceeding a desirable degree or level (as of expression)
try to rein in your spending, so you have some money left for saving
Synonyms & Similar Words
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Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for rein (in)
Verb
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Dominique could hardly contain himself in his seat.—
Mirin Fader,
New York Times,
7 Jan. 2026 -
Some fruit pits and seeds, like those in apples and pears, contain traces of cyanide, which is harmful to birds.—
Madeline Buiano,
Martha Stewart,
6 Jan. 2026
Verb
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According to Spark Biomedical, this stimulation regulates the nervous system and influences blood flow.—
Neetika Walter,
Interesting Engineering,
7 Jan. 2026
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The devices measure pollutants regulated by the EPA, including nitrogen oxides, ozone and particulate matter from sources like gas turbines, factories and heavy traffic.—
Jack Armstrong,
Memphis Commercial Appeal,
6 Jan. 2026
Verb
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Alex Rafalowicz, executive director of that initiative, told me the idea for a treaty builds on an International Court of Justice decision earlier this year that held nations legally responsible for curbing climate-heating pollution.—
John D. Sutter,
CNN Money,
9 Nov. 2025
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But Walpole’s excitement was curbed when they were flagged for excessive celebration.—
Justin Barrasso,
Boston Herald,
8 Nov. 2025
Verb
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The state Department of Education controls public education, under the leadership of the governor and the Legislature.—
SHELLEY SMITH SPECIAL TO THE DEMOCRAT-GAZETTE,
Arkansas Online,
10 Jan. 2026
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The farmers also pitched in with efforts of their own, including adjusting fertilizer methods, controlling soil erosion and increasing on-site water retention.—
Amy Green,
Miami Herald,
9 Jan. 2026
Verb
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The project blends electric mobility with real-time AI while keeping the driver in control.—
Aamir Khollam,
Interesting Engineering,
7 Jan. 2026
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But Daniels kept getting hurt this season, managing to start only seven games and getting shut down in December after a series of injuries to his left knee, right hamstring and left elbow.—
Arkansas Online,
Arkansas Online,
7 Jan. 2026
Verb
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The jury in the civil trial found that the man who restrained McGaff shared 40% of the responsibility.—
Teri Figueroa,
San Diego Union-Tribune,
8 Nov. 2025
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Initially, fears about the company’s debt load restrained its stock’s performance.—
Jeremy Kahn,
Fortune,
8 Nov. 2025
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Cite this Entry
“Rein (in).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/rein%20%28in%29. Accessed 11 Jan. 2026.
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