\ ˈrən-ˌin How to pronounce run-in (audio) \

Definition of run-in

 (Entry 1 of 2)

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

run in

ran in; run in; running in; runs in

Definition of run in (Entry 2 of 2)

transitive verb

1a : to insert as additional matter
b : to make (typeset matter) continuous without a paragraph or other break
2 : 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

Keep scrolling for more

Examples of run-in in a Sentence


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: Verb

Some consider the risk of becoming aligned with the Democratic Party worth running in an effort to give the most accurate measure of Mr Trump’s failings. The Economist, "A full-court press," 14 Sep. 2019 The homer, the second of Lux’s short career, came on a hanging curveball from Noah Syndergaard (10-8), who allowed four runs in five innings. Los Angeles Times, "Clayton Kershaw halts his losing skid with fine effort in Dodgers’ win over Mets," 13 Sep. 2019 Neither has allowed more than three runs in any of their last five starts. Cameron Dasilva, USA TODAY Sportsbook Wire, "Minnesota Twins at Cleveland Indians odds, picks and best bets," 13 Sep. 2019 Bolt d’Oro went on to run in the Kentucky Derby, finishing 12th. Jason Frakes, The Courier-Journal, "Trainer of Santa Anita Derby runner-up threatens lawsuit after Justify doping allegation," 12 Sep. 2019 Roark allowed five runs in 5 ⅔ innings, three on solo homers by George Springer (two) and Martin Maldonado. Susan Slusser,, "A’s hit back hard in 21-7 rout at Houston," 10 Sep. 2019 Tanner Roark gave up five runs in 5.2 innings, striking out three with one walk. Shayna Rubin, The Mercury News, "Athletics turn tables on Astros with 21-run, six-home run win," 10 Sep. 2019 Brasier blew a 4-3 lead, giving up six runs in the eighth inning. Dan Shaughnessy,, "Dave Dombrowski discovers having the biggest payroll always comes with a price," 9 Sep. 2019 In the early 1970s Johnson Products became a sponsor of the groundbreaking TV dance and musical variety program, which went on to run in national syndication for almost four decades. Konstantin Toropin, CNN, "Joan Johnson, who co-founded the black hair company that made Afro Sheen, has died," 9 Sep. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'run-in.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of run-in


1799, in the meaning defined at sense 1


1888, in the meaning defined at sense 1b

Keep scrolling for more

Learn More about run-in

Statistics for run-in

Look-up Popularity

Time Traveler for run-in

The first known use of run-in was in 1799

See more words from the same year

Keep scrolling for more

More Definitions for run-in



English Language Learners Definition of run-in

informal : an angry argument


\ ˈrən-ˌin\

Kids Definition of run-in

: an angry argument

Keep scrolling for more

More from Merriam-Webster on run-in

Rhyming Dictionary: Words that rhyme with run-in

Thesaurus: All synonyms and antonyms for run-in

Spanish Central: Translation of run-in

Nglish: Translation of run-in for Spanish Speakers

Comments on run-in

What made you want to look up run-in? Please tell us where you read or heard it (including the quote, if possible).


formidable, illustrious, or eminent

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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