✨📕 The NEWThe NEW Collegiate Dictionary, 12th Edition Over 5,000 words added — Buy Now! Collegiate DictionaryBuy Now!

break-in

1 of 2

noun

1
: the act or action of breaking in
a rash of break-ins at the new apartment house
2
: a performance or a series of performances serving as a trial run
3
: an initial period of operation during which working parts begin to function efficiently

break in

2 of 2

verb

broke in; broken in; breaking in; breaks in

intransitive verb

1
: to enter something (such as a building or computer system) without consent or by force
2
a
: intrude
break in upon his privacy
b
: to interrupt a conversation
3
: to start in an activity or enterprise
breaking in as a cub reporter

transitive verb

1
: to accustom to a certain activity or occurrence
break in the new clerk
2
: to overcome the stiffness or newness of
break in a pair of shoes

Synonyms of break-in

Examples of break-in in a Sentence

Verb the burglars broke in by smashing a window he rudely broke in to drop the names of several celebrities that he had met
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
What To Know Lopez discovered the break-in after spending the Thanksgiving holiday with family, finding her bedroom ransacked and Rocky missing. Adeola Adeosun, MSNBC Newsweek, 29 Nov. 2025 Officers also connected the woman to a break-in at Famous Footwear and the theft of a $90 pair of shoes. Darrell Smith, Sacbee.com, 28 Nov. 2025
Verb
There’s another sting in the ban, too, coming at the end of the Australian school year before the summer break in the southern hemisphere. Hilary Whiteman, CNN Money, 29 Nov. 2025 System updates patch these flaws and close off entry points that attackers use to break in. Kurt Knutsson, FOXNews.com, 29 Nov. 2025 See All Example Sentences for break-in

Word History

First Known Use

Noun

1807, in the meaning defined at sense 1

Verb

14th century, in the meaning defined at intransitive sense 1

Time Traveler
The first known use of break-in was in the 14th century

Browse Nearby Words

See all Nearby Words

Cite this Entry

“Break-in.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/break-in. Accessed 1 Dec. 2025.

Kids Definition

break-in

1 of 2 noun
ˈbrā-ˌkin
: an act or instance of breaking in

break in

2 of 2 verb
(ˈ)brā-ˈkin
1
: to enter a house or building by force
2
a
: to make used to an activity
breaking in a new employee
b
: to overcome the newness or stiffness of
breaking in a new pair of shoes

Legal Definition

break-in

1 of 2 noun
ˈbrāk-ˌin
: the act or action of breaking in

break in

2 of 2 intransitive verb
: to enter something (as a building or computer system) without privilege (as consent) or by force

More from Merriam-Webster on break-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!