fleeting

adjective

fleet·​ing ˈflē-tiŋ 

: passing swiftly : transitory

… the often fleeting nature of fame and fortune …

—Tom Sinclair

fleetingly

ˈflē-tiŋ-lē 

adverb

fleetingness noun

Synonyms of fleeting

• flash
• brief
• temporary
• transient
• passing
• transitory
• ephemeral
• momentary
• evanescent

Choose the Right Synonym for fleeting

transient, transitory, ephemeral, momentary, fugitive, fleeting, evanescent mean lasting or staying only a short time.

transient applies to what is actually short in its duration or stay.

a hotel catering primarily to transient guests

transitory applies to what is by its nature or essence bound to change, pass, or come to an end.

fame in the movies is transitory

ephemeral implies striking brevity of life or duration.

many slang words are ephemeral

momentary suggests coming and going quickly and therefore being merely a brief interruption of a more enduring state.

my feelings of guilt were only momentary

fugitive and fleeting imply passing so quickly as to make apprehending difficult.

let a fugitive smile flit across his face

fleeting moments of joy

evanescent suggests a quick vanishing and an airy or fragile quality.

the story has an evanescent touch of whimsy that is lost in translation

Examples of fleeting in a Sentence

I caught a fleeting glimpse of the comet.

had a fleeting desire to jump into the cool lake but kept on hiking

Recent Examples on the Web

These fleeting encounters, once dismissed as background noise, have now revealed new behavior in the strong nuclear force—the fundamental force that binds matter together. —Rupendra Brahambhatt, Interesting Engineering, 28 Mar. 2026

The deep space image captures a fleeting moment in a titanic struggle that has lasted hundreds of millions of years, as the gravitational influence of the galaxies NGC 4038 and NGC 4039 pulls at one another to create chaos on a truly cosmic scale. —Anthony Wood, Space.com, 28 Mar. 2026

One influential theory, the Global Neuronal Workspace, leaves the fleeting feelings of experience outside the scientific puzzle, treating them as irrelevant to mechanistic explanations. —Shai Tubali, Big Think, 27 Mar. 2026

The problem, apart from perennial budget pressures, is that interest in election mechanics — a technical and arcane subject if ever there was one — is episodic and fleeting. —Mark Z. Barabak, Mercury News, 26 Mar. 2026

Word History

First Known Use

1563, in the meaning defined above

Rhymes for fleeting

• beating
• bleating
• cheating
• eating
• greeting
• heating
• meeting
• seating
• sheeting
• sweeting
• treating
• accreting

Kids Definition

fleeting

adjective

fleet·​ing

ˈflēt-iŋ

: not lasting : passing swiftly

a fleeting glimpse