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Definitions

deciduous

[dih-sij-oo-uhs] / dɪˈsɪdʒ u əs /
ADJECTIVE
short-lived
Synonyms
STRONGEST
brief ephemeral fleeting momentary short-term temporary transitory
WEAK
evanescent fly-by-night fugacious fugitive gone in a heartbeat impermanent of short duration over in a heartbeat passing quick short short-haul short-run transient
Antonyms
STRONGEST
enduring lasting lengthy long long-lived permanent perpetual
WEAK
ethereal
ADJECTIVE
transient
Synonyms
STRONGEST
ephemeral fleeting short-term transitory
STRONG
brief flash fly-by-night flying fugitive passing short temporal volatile
WEAK
changeable emigrating evanescent flitting fugacious going by impermanent insubstantial migrating momentary moving provisional short-lived transmigratory unstable vacating
Antonyms
STRONGEST
enduring lasting lengthy long long-lived permanent perpetual
ADJECTIVE
transient/transitory
Synonyms
WEAK
changeable emigrating ephemeral evanescent flash fleeting flitting fly-by-night flying fugacious fugitive going by impermanent insubstantial migrating momentary moving passing provisional short short-lived short-term temporal transmigratory unstable vacating volatile
Antonyms
WEAK
enduring incessant lasting long-lasting neverending permanent persistent undying

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.

"And we're involved in restoring tropical forest, dry deciduous forest, grassland, steppe - you name it - we're trying to help people put those plants back in place."

From BBC • Oct. 19, 2025

In Gramsh, the municipality is exploring options to alternate pines with other trees, especially deciduous species.

From Barron's • Oct. 11, 2025

I share Vejar’s loathing for the relentless “tree of heaven,” the deciduous plant that is sometimes called a stinking sumac.

From Los Angeles Times • Aug. 10, 2025

In many areas, deciduous shrubs and trees, like willow and aspen, are moving in after a fire.

From Science Daily • Apr. 16, 2024

Japanese forest composition varies with latitude and altitude: evergreen leafy forest in the south at low altitude, deciduous leafy forest in central Japan, and coniferous forest in the north and at high altitude.

From "Guns, Germs, and Steel: The Fates of Human Societies" by Jared M. Diamond

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