run-in

1 of 2

noun

Synonyms of run-innext
1
British : the final part of a race or racetrack
2
3
: something inserted as a substantial addition in copy or typeset matter

run in

2 of 2

verb

ran in; run in; running in; runs in

transitive verb

1
a
: to insert as additional matter
b
: to make (typeset matter) continuous without a paragraph or other break
2
somewhat old-fashioned : to arrest for a usually minor offense
3
chiefly British : to break in (a new machine) gradually by careful operation

intransitive verb

: to pay a casual visit

Examples of run-in in a Sentence

Noun the rival gangs had a bit of a run-in last night Verb I just thought I'd run in and pick up my package. if we catch you shoplifting again, we're going to run you in
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Noun
The actor also had run-ins with the law, including an arrest in May 2023 after turning his car off in the middle of a three-lane road. Daniel S. Levine, PEOPLE, 22 Jan. 2026 Prince Harry will return to his hometown of London next week, but his chances of an awkward run-in with estranged family members Kate Middleton, Prince William, and King Charles III are slim. Roberta Mercuri, Vanity Fair, 18 Jan. 2026
Verb
Denver more than doubled its lead with an 8-0 run in a spectacular last 35 seconds of the half, started by a highlight alley-oop from Murray to Aaron Gordon, who snuck behind the defense along the baseline. Bennett Durando, Denver Post, 21 Jan. 2026 Chicago led by 21 points at the half after matching a season high with 45 points in the second quarter and broke the game back open after Los Angeles made a run in the third. CBS News, 21 Jan. 2026 See All Example Sentences for run-in

Word History

First Known Use

Noun

1799, in the meaning defined at sense 1

Verb

1888, in the meaning defined at sense 1b

Time Traveler
The first known use of run-in was in 1799

Browse Nearby Words

Cite this Entry

“Run-in.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/run-in. Accessed 23 Jan. 2026.

Kids Definition

run-in

noun
ˈrən-ˌin
: an angry dispute : quarrel

More from Merriam-Webster on run-in

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!