noun · 7 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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/sɪˈnɛ.səns/
/səˈnɛ.səns/
Southern-England:Recorded audio is listed in the source snapshot.
CMU ARPABET:S AH0 N EH1 S AH0 N S
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
The state or process of ageing, especially in humans; old age.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable, usually
Topics: biology, natural-sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: oldhood, senectitude, vetustity, age, chair days, codgerhood, eld, elderliness, fogeydom, geezerdom, golden years, old age, senescence, superannuation, twilight years, sunset years
Antonyms: none provided
2
noun
Meaning 2
Ceasing to divide by mitosis because of shortening of telomeres or excessive DNA damage.
Definition source: English Wiktionary via Wiktextract
2018, University of Edinburgh, "Liver Study Offers Insights into Hard-to-treat Diseases" (9 March 2018), Drug Discovery & Development. Tests in mice found that inducing senescence in bile duct cells - mimicking the process seen in human bile duct disease - led to liver scarring and damage of liver function.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
Old age; accumulated damage to macromolecules, cells, tissues and organs with the passage of time.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable, usually
Topics: gerontology, medicine, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
noun
Meaning 4
Fruit senescence, leading to ripening of fruit.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable, usually
Topics: biology, botany, natural-sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
noun
Meaning 5
Condition when the cell ceases to divide.
Definition source: English Wiktionary via Wiktextract