fall in
Britishverb
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to collapse; no longer act as a support
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to adopt a military formation, esp as a soldier taking his place in a line
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(of a lease) to expire
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(of land) to come into the owner's possession on the expiry of the lease
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(often foll by with)
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to meet and join
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to agree with or support a person, suggestion, etc
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to make a mistake or come to grief
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to become pregnant
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Take one's place in formation or in the ranks, as in The sergeant ordered the troops to fall in . A related expression is fall into , as in They all fell into their places . [Early 1600s] Also see fall into .
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Sink inward, cave in, as in The snow was so heavy that we feared the roof would fall in . [Early 1700s] Also see under drop in ; the subsequent idioms beginning with fall in ; fall into .
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Sierra Canyon will play its first girls’ flag football game this fall in the fourth year of the CIF-sanctioned sport.
From Los Angeles Times • Jun. 28, 2026
I wasn’t supposed to fall in love with a boy from my hometown.
From Los Angeles Times • Jun. 26, 2026
Temperatures are expected to fall in western Europe from Friday but eastern Europe was on red alert as temperatures climbed into the weekend.
From Barron's • Jun. 25, 2026
One concern is the form of opener Amy Jones, who sliced a catch to short third to fall in the first over for the second match in succession.
From BBC • Jun. 24, 2026
In the chaos, Natalie saw Javari fall in the water.
From "Two Degrees" by Alan Gratz
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.