SENESCENCE Synonyms: 25 Similar and Opposite Words

senescence

noun

Definition of senescence

as in senility

technical + formal the state of being old or the process of becoming old premature senescence

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Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of senescence The Aquarium announced Ghost’s senescence online in September. — Los Angeles Times, 26 Mar. 2026 Ghost had laid eggs and entered the final stage of her life cycle, called senescence, back in September and died a natural death on Tuesday, aquarium staff said. — Julie Sharp, CBS News, 25 Mar. 2026 Sinclair’s work on senescence intersects with new therapeutic directions in oncology, from CAR-T failures linked to T-cell exhaustion to the growing interest in senolytic adjuvants. — Gilberto Lopes, STAT, 12 Feb. 2026 Or, the first generation simply declined from senescence and the debilitating effects of power long exercised without check. — Eliot A. Cohen, The Atlantic, 4 Jan. 2026 See All Example Sentences for senescence

Recent Examples of Synonyms for senescence

Noun

Trump has boosted a conspiracy theory that Biden’s administration used the autopen without his knowledge to cover up his alleged senility.

— Joseph Konig, PEOPLE, 2 July 2026
Then the interview happens, and Thomas is swinging between lucidity and senility, and a million things about their relationship come up, and the fiction records the interview the phone couldn’t capture.

— Andrew Marantz, New Yorker, 5 Apr. 2026

Definition of senility

Noun

As is to be expected with a player of his age, there will be flashes of brilliance and lapses of concentration in equal measure as Karetsas desperately tries to make things happen every time the ball comes his way.

— Anantaajith Raghuraman, New York Times, 8 Sep. 2026
Shuler played a week after his family announced the death of his father, Don Shuler, at age 47.

— Colleen Kane, Chicago Tribune, 8 Sep. 2026

Definition of age

Noun

These data points help illustrate the brand’s risk tolerance, growth strategy, system maturity and unit retention outlook.

— Angelo Chavez, Forbes.com, 4 Sep. 2026
That experience helped shape Antares’ thinking around reliability and manufacturing maturity.

— Aamir Khollam, Interesting Engineering, 2 Sep. 2026

Definition of maturity

Browse Nearby Words

senectitude

senescence

senescent

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“Senescence.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/senescence. Accessed 17 Sep. 2026.

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Synonyms of senescence

noun

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