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upon

[uh-pon, uh-pawn] / əˈpɒn, əˈpɔn /
PREPOSITION
at the time of
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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Tech firms are racing to roll out advanced smartphones that use artificial intelligence to do everything from ordering food to composing messages upon a simple voice command.

From Barron's Jul. 19, 2026

"Only a minute fraction of the projectile is preserved in the planet's KT clay layer because the entire meteorite vaporized upon impact."

From Science Daily Jul. 19, 2026

Those who are held for shorter periods of time also describe better conditions upon release than other detainees who are held for longer periods.

From Salon Jul. 17, 2026

Asked about the decision to warn about the poor results, Cohn said, “Arvind took it upon himself to say, ‘Look, I want to be transparent with the world.

From The Wall Street Journal Jul. 16, 2026

Once upon a time we were, at least.

From "Legendary Frybread Drive-In" by Cynthia Leitich Smith




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