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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
upon encountering
Grammar usage guide and real-world examplesUSAGE SUMMARY
"upon encountering" is a correct and usable phrase in written English.
It is used to indicate that something happened as soon as someone or something encountered something else. Example: Upon encountering the enemy flag in the distance, the soldiers readied their weapons.
✓ Grammatically correct
Science
News & Media
Encyclopedias
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
60 human-written examples
Upon encountering a piece of information, in any form, ask, "Who is telling me this?
News & Media
They gave each other knowing nods in the way transcendent athletes do upon encountering one another.
News & Media
Each is assigned two potential lines to deliver upon encountering a stranger in a certain scenario.
News & Media
The coyote also competes with the red fox, which it will kill upon encountering.
Encyclopedias
Upon encountering other paddlers, Mr. Paquin said, his suggestions to don a life jacket are sometimes ignored.
News & Media
I remember my shock, in the late nineteen-seventies, upon encountering Struth's shots of familiar SoHo streets.
News & Media
Upon encountering a foreign substance (or antigen), the B lymphocyte differentiates into a plasma cell, which secretes immunoglobulin (antibodies).
Encyclopedias
The persistent protagonist of "The Census Taker" finds his life's validity tested upon encountering a woman who refuses to cough up any information.
News & Media
On April 25 , 1936 he writes about his amusement, as a hay-fever sufferer, upon encountering a fellow victim on the sidewalk.
News & Media
Upon encountering a discarded sock puppet resembling the advertising mascot of the defunct Pets.com, the chimp sheds a tear as the closing line reminds viewers: "Invest wisely".
News & Media
When I got to the end, I had the experience Irving Howe described upon encountering the story for the first time: "I felt my blood rise".
News & Media
Expert writing Tips
Best practice
Use "upon encountering" to emphasize the immediate consequence or reaction to a specific situation or stimulus. It adds a touch of formality and precision to your writing.
Common error
Avoid using "upon encountering" in very casual or informal writing, as it can sound overly formal. Simpler alternatives like "when" or "after" may be more appropriate.
Source & Trust
82%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "upon encountering" functions as a prepositional phrase introducing a circumstance or condition. It sets the stage for an event that immediately follows the act of encountering something. As Ludwig AI confirms, it is a grammatically sound and usable phrase.
Frequent in
Science
39%
News & Media
37%
Wiki
8%
Less common in
Encyclopedias
5%
Huffington Post
5%
Science Magazine
2%
Ludwig's WRAP-UP
In summary, "upon encountering" is a grammatically correct prepositional phrase used to denote that something happens immediately after encountering something else, as confirmed by Ludwig. Its function is to establish a cause-and-effect relationship, often found in formal writing contexts. It's prevalent in scientific and news media, as seen in the provided examples. While effective in formal settings, remember that simpler alternatives like "when" or "after" are suitable for more casual contexts.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
on encountering
This alternative is a more concise way to express the same idea, replacing 'upon' with 'on'.
when encountering
This alternative uses a simpler conjunction to indicate the timing of the encounter.
after encountering
This alternative specifies that the action happens after the encounter.
in the event of encountering
This alternative presents the encountering as a potential event.
should you encounter
This alternative is a more formal and conditional way of expressing the idea.
if you encounter
This alternative uses a more common conditional conjunction.
when faced with
This alternative focuses on the act of being confronted with something.
on discovery of
This alternative emphasizes the moment of finding or learning something.
after discovery of
This alternative specifies that the action happens after the moment of finding or learning something.
as soon as one encounters
This alternative emphasizes the immediacy of the action following the encounter.
FAQs
How can I use "upon encountering" in a sentence?
You can use "upon encountering" to describe something that happens immediately after someone or something comes across something else. For example, "Upon encountering the obstacle, the vehicle stopped abruptly."
What phrases are similar to "upon encountering"?
Similar phrases include "on encountering", "when encountering", or "after encountering". The best choice depends on the specific nuance you want to convey.
Is "upon encountering" formal or informal?
"Upon encountering" leans towards the formal side. In more casual contexts, using "when finding" or "after finding" might be more appropriate.
What's the difference between "upon encountering" and "after encountering"?
"Upon encountering" suggests a more immediate consequence than "after encountering". "Upon" implies that the second event happened almost at the same time as the encountering. With "after", there is less of an immediate association.
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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
82%
Authority and reliability
4.6/5
Expert rating
Real-world application tested