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Synonyms

momentary

American  
[moh-muhn-ter-ee] / ˈmoʊ mənˌtɛr i /

adjective

  1. lasting but a moment; very brief; fleeting.

    a momentary glimpse.

  2. that might occur at any moment; ever impending.

    to live in fear of momentary annihilation.

  3. effective or recurring at every moment; constant.


momentary British  
/ ˈməʊməntərɪ, -trɪ /

adjective

  1. lasting for only a moment; temporary

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of momentary

1425–75; late Middle English momentare < Latin mōmentārius. See moment, -ary

Explanation

Something that lasts for a very short time is momentary. A flash of lightning is momentary, since it blazes across the sky for only a second or two. Use the adjective momentary when you want to describe something brief or fleeting, like a momentary pause in a speech or a momentary flash of insight that pops into your head and disappears. If it lasts just a moment, it's momentary. The root word is the Latin momentarius, "of brief duration," which in turn comes from momentum, "short time, or instant."

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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.

Momentary pictures emerge from the crackling cloud and then sink back — a girl walking, a simple clapboard building, a hand holding a teacup, a car careening over a steep embankment and more.

From Los Angeles Times • Jul. 13, 2024

Momentary states, Beckmann explains, reflect how particular personality traits reveal themselves as a person responds to differing situations.

From Scientific American • Apr. 5, 2023

Momentary hallucinations tilt the show into motion as a mental-hygiene thriller, and extended dream sequences intertwine with waking life to escalate its tensions.

From The New Yorker • Sep. 21, 2018

Momentary flare-ups of jealousy can happen to just about anyone, and it’s not dangerous to discuss them with your partner, especially if you can do so in a self-aware, rational way.

From Slate • May 15, 2018

Momentary reflection suggested that the explanation of the one thing was the explanation of the other.

From The Lock and Key Library Classic Mystery and Detective Stories: Modern English by Castle, Egerton