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senescent

[si-nes-uhnt] / sɪˈnɛs ənt /
ADJECTIVE
aged
Synonyms
STRONGEST
elderly
STRONG
ancient antediluvian antiquated antique gray oldie shot worn
WEAK
age-old been around creaky getting on moth-eaten over the hill passé rusty senior citizen timeworn venerable worse for wear
Antonyms
STRONG
fresh modern new recent up-to-date young
WEAK
unripe youthful
ADJECTIVE
long in the tooth
Synonyms
WEAK
aging getting on getting up in years gray-haired white-haired
ADJECTIVE
obsolescent
Synonyms
WEAK
growing old out-of-date out-of-fashion
ADJECTIVE
senile
Synonyms
WEAK
aged ancient anile decrepit doddering doting enfeebled feeble imbecile in second childhood infirm old shattered sick weak
Antonyms
WEAK
alert well young
NOUN
aging
Synonyms
STRONG
crumbling declining developing fading fermenting maturing mellowing slumping stale waning
WEAK
getting along getting on wearing out

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.

"Eliminating senescent cells doesn't just slow the fatty liver -- it actually reverses it."

From Science Daily • Apr. 16, 2026

They found that the same senescent macrophage signature was significantly higher in diseased livers than in healthy ones.

From Science Daily • Apr. 16, 2026

One reason for the confusion is that healthy macrophages already show some of the same molecular features seen in senescent cells, making it difficult to distinguish between normal and dysfunctional states.

From Science Daily • Apr. 16, 2026

The researchers next asked whether removing senescent cells could help restore the intestine's ability to heal.

From Science Daily • Jan. 3, 2026

In one thin arm, threaded with veins in a kind of senescent bas-relief, was a basket.

From "The Great Santini" by Pat Conroy

Vocabulary lists containing senescent

This Week In Words: August 31–September 6, 2019

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Ancient Wisdom: Synonyms for "Old"

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The Last Cuentista

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!