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Showing results for serendipitous.
Definitions

serendipitous

[ser-uhn-dip-i-tuhs] / ˌsɛr ənˈdɪp ɪ təs /
ADJECTIVE
casual
Synonyms
STRONGEST
occasional offhand spontaneous
WEAK
accidental adventitious by chance by-the-way contingent erratic extemporaneous extempore fluky fortuitous impromptu improvised impulsive incidental infrequent irregular odd uncertain unexpected unforeseen unintentional unplanned unpremeditated
Antonyms
STRONGEST
deliberate planned
WEAK
formal painstaking premeditated serious
ADJECTIVE
fortuitous
Synonyms
STRONGEST
fortunate odd random unforeseen
WEAK
arbitrary casual chance contingent fluke fluky haphazard happy incidental luck in luck out lucky-dog providential unplanned
Antonyms
WEAK
calculated deliberate designed intentional planned unlucky
ADJECTIVE
helpful
Synonyms
STRONGEST
accessible advantageous applicable conducive constructive convenient cooperative crucial essential favorable friendly important invaluable practical productive profitable significant suitable supportive sympathetic timely useful valuable
WEAK
accommodating benevolent bettering caring considerate contributive effectual efficacious fortunate good for improving instrumental kind neighborly operative pragmatic serviceable symbiotic usable utilitarian
Antonyms
STRONGEST
cold cool disagreeable hindering hurting inappropriate inessential injurious inopportune insignificant minor nonessential trivial unfavorable unfriendly unhelpful unimportant unsociable unsuitable useless worthless
WEAK
disadvantageous harmful hurtful unconstructive
ADJECTIVE
lucky
Synonyms
STRONGEST
fortuitous happy hot successful
WEAK
advantageous adventitious all systems go auspicious beneficial benign blessed charmed coming up roses everything going favored felicitous getting a break golden hit it big holding aces hopeful in the groove into something on a roll on a streak promising propitious prosperous providential striking it rich timely well
Antonyms
STRONGEST
unlucky
WEAK
bad inopportune unfortunate unpropitious unsuccessful

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.

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

"This is a great example of a serendipitous discovery, something we didn't expect to find but that will give us a new window into understanding planet-star relationships," Bouma concluded.

From Science Daily • Mar. 27, 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

"My journey in comedy since then has been such a series of blessings and serendipitous moments."

From BBC • Feb. 4, 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

Vocabulary lists containing serendipitous

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