Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
break in upon
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "break in upon" is correct and usable in written English.
It is typically used to describe the act of interrupting someone or something, often in a sudden or intrusive manner. Example: "I didn't mean to break in upon their conversation, but I had an urgent question that needed to be addressed."
✓ Grammatically correct
News & Media
Science
Alternative expressions(8)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
2 human-written examples
Iulia is buried on the hillside, and nothing else changed because of her presence: but the modern world is about to break in upon Mandragora rudely and thoroughly.
News & Media
Such considerations as the impact of his head on the water or on one of the stone piers of the bridge, his paralyzing sudden stagefright in front of that eminent audience, or helplessly sinking did not break in upon his idée fixe.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
Break Ins.
Wiki
Then: The awe and the fear of the New World broke in upon him.
News & Media
In 1866, the hospital's superintendent described psychosis as a "waking dream, which, if not broken in upon, works mischief to the brain," and wrote that the goal of treatment was to "interfere with this world of self scatter its creations and fancies and people it with objects and thoughts foreign to its own".
News & Media
On the tidal river there are also 9 rail bridges and 19 road bridges (most of which also accommodate pedestrians)." Here and elsewhere, the experience of reading "Thames" jars, as if fact-loving Mr. Gradgrind had broken in upon a class devoted to the splendidly unfettered rantings of Robert Graves's "White Goddess".
News & Media
In 1866, the hospital's superintendent described psychosis as a "waking dream, which, if not broken in upon, works mischief to the brain," and wrote that the goal of treatment was to "interfere with this world of self — scatter its creations and fancies and people it with objects and thoughts foreign to its own".
News & Media
And yet as soon as I said that, something (hope? the thing with wings?) broke in upon me -- God is here.
News & Media
McLean died with most of his crew after being hit by anti-aircraft fire and ditching into the sea, a notoriously risky operation in the Liberator owing to the fuselage's tendency to break in two upon striking the water.
Wiki
Resting membrane potential was measured immediately upon break-in.
Science
Access resistance (Ra) was <25 MΩ upon break-in; data obtained from a given cell were rejected if Ra changed by >20% during the course of the experiment.
Science
Expert writing Tips
Best practice
Use "break in upon" to describe a sudden or intrusive interruption, especially when emphasizing the disruption caused.
Common error
Avoid using "break in upon" when a simpler verb like "interrupt" or "intrude" is more appropriate. Overusing the phrase can make your writing sound unnecessarily formal or archaic.
Source & Trust
89%
Authority and reliability
4.3/5
Expert rating
Real-world application tested
Linguistic Context
The phrasal verb "break in upon" functions as a verb phrase that describes the action of interrupting or intruding, usually in a sudden or disruptive manner. Ludwig shows this usage in various contexts.
Frequent in
News & Media
50%
Science
50%
Formal & Business
0%
Less common in
Encyclopedias
0%
Wiki
0%
Academia
0%
Ludwig's WRAP-UP
The phrasal verb "break in upon" is a grammatically correct phrase used to describe a sudden or intrusive interruption. Ludwig indicates that its usage appears most frequently in News & Media and Scientific contexts. While considered acceptable for use, it's relatively rare. Alternatives like "interrupt" or "intrude" might be more appropriate in certain contexts to avoid sounding overly formal.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
interrupt
Focuses on the act of stopping someone or something temporarily.
intrude on
Emphasizes the act of entering someone's space or privacy without permission.
disturb
Highlights the act of disrupting someone's peace or concentration.
encroach upon
Suggests a gradual intrusion or infringement on someone's rights or territory.
barge in
Conveys a sudden and forceful interruption.
butt in
Implies an impolite or unwanted interruption in a conversation.
chime in
Suggests a brief and often welcome interruption to add a comment.
cut in
Indicates an abrupt interruption, often in a conversation.
break into
Focuses on entering a place illegally, differing from the original meaning.
interfere with
Highlights the act of hindering or obstructing something.
FAQs
What does "break in upon" mean?
The phrase "break in upon" means to interrupt or intrude on something, often suddenly or unexpectedly. It can also imply a disruption of peace or order.
How can I use "break in upon" in a sentence?
You might say, "I didn't mean to "interrupt", but I had to break in upon their meeting with an urgent message." /s/interrupt
What's the difference between "break in upon" and "interrupt"?
"Interrupt" is a more general term for stopping someone or something temporarily. "Break in upon" often suggests a more forceful or intrusive interruption.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
89%
Authority and reliability
4.3/5
Expert rating
Real-world application tested