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serendipitous

American  
[ser-uhn-dip-i-tuhs] / ˌsɛr ənˈdɪp ɪ təs /

adjective

  1. come upon or found by accident; fortuitous.

    serendipitous scientific discoveries.

  2. good; beneficial; favorable.

    serendipitous weather for our vacation.


Other Word Forms

Etymology

Origin of serendipitous

First recorded in 1940–45; serendipit(y) + -ous

Explanation

Serendipitous is an adjective that describes accidentally being in the right place at the right time, like bumping into a good friend in some unusual location, or finding a hundred dollar bill on the ground. The root of serendipitous comes from the fairy tale "The Three Princes of Serendip," in which three princes make one lucky and surprising discovery after another. A serendipitous moment happens by accident, usually when you’re doing something completely unrelated, like digging a hole in your yard to bury your hamster and finding a treasure chest of jewels. That’s a sad but serendipitous funeral.

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Vocabulary lists containing serendipitous

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.

See Examples For:

Sure enough, strange serendipitous moments started happening for Small.

From Los Angeles Times Apr. 3, 2026

Come to think of it, thoughts are perhaps not unlike a murmuration of starlings, flitting and swooping and morphing with seemingly serendipitous activation.

From The Wall Street Journal Mar. 29, 2026

"It's serendipitous timing," says Prof Jim Wild, a space physicist at Lancaster University and a member of the AuroraWatch UK team, which lets people know when the Northern Lights might be seen in the UK.

From BBC Feb. 14, 2026

Daniel Holz -- a University of Chicago astrophysicist focused on black holes, who was not involved in the study -- told AFP the "serendipitous" nature of the latest example makes it particularly exciting.

From Barron's Feb. 12, 2026

But the most serendipitous aspect of the CPS program—for the sake of a study, at least—is how the school-choice game was played.

From "Freakonomics: A Rogue Economist Explores the Hidden Side of Everything" by Steven D. Levitt

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