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Definitions

momentary

[moh-muhn-ter-ee] / ˈmoʊ mənˌtɛr i /
ADJECTIVE
brief, fleeting
Synonyms
STRONGEST
short-lived temporary transitory
WEAK
cursory dreamlike ephemeral evanescent flashing flitting flying fugacious fugitive gone in flash hasty impermanent impulsive in wink of an eye instantaneous like lightning passing quick shifting short spasmodic summary transient vanishing volatile
Antonyms
STRONGEST
lasting lengthy long-lived permanent
WEAK
long-lasting staying

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.

CrowdStrike Holdings is having a stellar month, and that hot run isn’t just a momentary blip, according to analysts at Morgan Stanley.

From Barron's • Apr. 2, 2026

Speaking to the BBC last year, she admitted to a momentary crisis of confidence.

From BBC • Mar. 26, 2026

Anthropic’s standoff with the Defense Department has cost it Uncle Sam as a customer, but it has brought a momentary advantage in the ferocious talent war between rival artificial intelligence labs.

From The Wall Street Journal • Mar. 10, 2026

Observing that momentary disappearance allows scientists to calculate the asteroid's position, speed, and shape with remarkable precision.

From Science Daily • Mar. 9, 2026

After the momentary shock, Caroline would have a whole arm and we would all join Mrs. Ruiz’s parties to celebrate.

From "Krik? Krak!" by Edwidge Danticat

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.