Standard Lemma guide

senility

noun · 5 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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /səˈnɪlɪti/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -ɪlɪti
  • CMU ARPABET: S AH0 N IH1 L AH0 T IY0 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

The bodily and mental deterioration associated with old age: Synonym of senescence.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Examples

  • Near-synonym: second childhood

Meaning relationships

Synonyms: second childhood

Antonyms: juvenescence, juvenility

2

noun

Meaning 2

The losing of memory and reason due to senescence.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Examples

  • He was entering his years of senility and not liking it a bit.

Meaning relationships

Synonyms: none provided

Antonyms: juvenility

3

noun

Meaning 3

An elderly, senile person.

Definition source: English Wiktionary via Wiktextract

Usage: archaic, countable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: juvenile

4

noun

Meaning 4

the state of being senile

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: oldness

5

noun

Meaning 5

mental infirmity as a consequence of old age; sometimes shown by foolish infatuations

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: dotage, second childhood

Antonyms: none provided

Broader terms: old age, years, age, eld, geezerhood

History

Etymology

Etymology tree English senile Proto-Indo-European *-teh2 Proto-Indo-European *-ts Proto-Indo-European *-teh2ts Latin -itāsder. Old French -itebor. Middle English -ite English -ity English senility From senile + -ity.

Across languages

Translations

26 source translations are retained for this English entry.

  • Breton: kabac'hded — the losing of memory and reason
  • Bulgarian: сенилност (senilnost) — the losing of memory and reason
  • Bulgarian: изкуфялост (izkufjalost) — the losing of memory and reason
  • Catalan: senilitat — the losing of memory and reason
  • Chinese: 痴呆 (chidai) — the losing of memory and reason
  • Dutch: seniliteit — the losing of memory and reason
  • Finnish: vanhuudenhöperyys — the losing of memory and reason
  • Finnish: seniiliys — the losing of memory and reason
  • French: sénilité — the losing of memory and reason
  • German: Senilität — the losing of memory and reason
  • Greek: γεροντική άνοια (gerontikí ánoia) — the losing of memory and reason
  • Italian: senilità — the losing of memory and reason
  • Japanese: 耄碌 (mōroku) — the losing of memory and reason
  • Macedonian: изветреаност (izvetreanost) — the losing of memory and reason
  • Macedonian: излапеност (izlapenost) — the losing of memory and reason
  • Macedonian: сенилност (senilnost) — the losing of memory and reason
  • Plautdietsch: Ellaschwakheit — the losing of memory and reason
  • Polish: starczość — the losing of memory and reason
  • Portuguese: senilidade — the losing of memory and reason
  • Romanian: senilitate — the losing of memory and reason
  • Russian: ста́рость (stárostʹ) — the losing of memory and reason
  • Russian: дря́хлость (drjáxlostʹ) — the losing of memory and reason
  • Spanish: senilidad — the losing of memory and reason
  • Swedish: senilitet — the losing of memory and reason
  • Tausug: kalīanan — the losing of memory and reason
  • Bulgarian: старец (starec) — an elderly, senile person