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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.

"Then, in deciduous forests, the particles are transported to the forest soil by rain or the autumn leaf fall, for example."

From Science Daily • Mar. 23, 2026

"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

It included 16 ingredients, Indian mulberry, golden eye-grass, the deciduous perennial Asian lizard’s tail and the carrot-like plant Szechuan Lovage among them.

From Los Angeles Times • Sep. 2, 2024

The deciduous trees stood up in skeleton, like maps of the veins or of the nervous system.

From "The Once and Future King" by T. H. White

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