Standard Lemma guide

triennial

adj · noun · 6 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.

  • /tɹaɪˈɛni.əl/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -ɛniəl
  • CMU ARPABET: T R AY0 EH1 N IY0 AH0 L Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Happening every three years.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Examples

  • triennial elections

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Lasting for three years.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Examples

  • triennial parliaments; a triennial reign
  • September 13 1621, James Howell. letter to Sir William Saint John Triennial Subsidies

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

A third anniversary.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

A plant that requires three years to complete its life-cycle.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

adjective satellite

Meaning 5

occurring every third year or lasting 3 years

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

the 300th anniversary (or the celebration of it)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: tercentennial, tercentenary

Antonyms: none provided

Broader terms: anniversary, day of remembrance

History

Etymology

From Latin triennium (“three-year period”), from tres (“three”) + annus (“year”). By surface analysis, tri- + -ennial.

Across languages

Translations

29 source translations are retained for this English entry.

  • Bulgarian: тригоди́шен (trigodíšen) — happening every three years
  • Danish: treårig — happening every three years
  • Finnish: kolmivuosittainen — happening every three years
  • French: triennal — happening every three years
  • Galician: trienal — happening every three years
  • Italian: triennale — happening every three years
  • Manx: tree bleeanagh — happening every three years
  • Norwegian Bokmål: treårig — happening every three years
  • Polish: cotrzyletni — happening every three years
  • Portuguese: trienal — happening every three years
  • Russian: трёхгоди́чный (trjoxgodíčnyj) — happening every three years
  • Spanish: trienal — happening every three years
  • Swedish: treårig — happening every three years
  • Belarusian: трохгадо́вы (troxhadóvy) — lasting for three years
  • Danish: treårig — lasting for three years
  • Finnish: kolmivuotinen — lasting for three years
  • French: triennal — lasting for three years
  • Galician: trienal — lasting for three years
  • German: dreijährig — lasting for three years
  • Italian: triennale — lasting for three years
  • Norwegian Bokmål: treårig — lasting for three years
  • Polish: trzyletni — lasting for three years
  • Russian: трёхле́тний (trjoxlétnij) — lasting for three years
  • Russian: трёхгодово́й (trjoxgodovój) — lasting for three years
  • Swedish: treårig — lasting for three years
  • Ukrainian: трирі́чний (tryríčnyj) — lasting for three years
  • Ukrainian: трилі́тній (trylítnij) — lasting for three years
  • Bulgarian: тригоди́шнина (trigodíšnina) — plant that requires three years to complete its life cycle
  • Manx: treebleeantag — plant that requires three years to complete its life cycle
Real reading context

triennial in complete knowledge articles