1 C1 idiomatic formal
To discover or find something by chance, without deliberate searching.
"Browsing in the library, she lit on an obscure manuscript that changed her research entirely."
inseparable
light on
C1 formal inseparable transitive
To discover or come across something by chance; to settle or land on something.
In plain English
To find something without really looking for it, or to land gently on something.
What does "light on" mean?
2 meanings, ordered from most common to least. Color-coded by CEFR level.
2 C1 neutral
To land or settle gently on a surface (said of a bird, insect, or something falling softly).
"A butterfly lit on the flower for a moment before flying away."
inseparable
Literal vs figurative
Words literally mean
For a bird or insect to land gently on a surface — the figurative sense extends this to ideas or discoveries.
Actually means
To find something without really looking for it, or to land gently on something.
Usage tip
Relatively formal and literary in both senses. 'Light upon' is an equivalent variant (see separate entry). More common in British English and older texts.
Words that pair with "light on"
Natural word combinations native speakers use most often.
idea solution answer discovery truth branch
How to conjugate "light on"
The five tense forms you'll use most often.
Base
light on
I/you/we/they
3rd person
lights on
he/she/it
Past simple
lighted on
yesterday
Past participle
lighted on
have + pp
-ing form
lighting on
continuous
Hear "light on" in the wild
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Other ways to say "light on"
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Keep exploring
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