1. adjective /tɹaɪˈɛnɪəl/
a) Happening every three years.
b) Lasting for three years.
2. noun /tɹaɪˈɛnɪəl/
A third anniversary.

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  • Triennial — Tri*en ni*al, a. [L. triennium the space of three years; tri (see {Tri }) + annus year. See {Annual}.] 1. Continuing three years; as, triennial parliaments; a triennial reign. Howell. [1913 Webster] 2. Happening, coming about, or appearing once… …   The Collaborative International Dictionary of English

  • triennial — [trī en′ē əl] adj. [< L triennium, three years < tri ,TRI + annus, year: see ANNUAL] 1. happening every three years 2. lasting three years n. a triennial event or occurrence triennially adv …   English World dictionary

  • Triennial — Tri*en ni*al, n. Something which takes place or appears once in three years. [1913 Webster] …   The Collaborative International Dictionary of English

  • triennial — 1630s, lasting three years; 1640s, occurring every three years, from L. triennium three year period, from tri three + annus year (see ANNUAL (Cf. annual)) …   Etymology dictionary

  • triennial — ► ADJECTIVE ▪ lasting for or recurring every three years. DERIVATIVES triennially adverb …   English terms dictionary

  • triennial — adjective Date: 1562 1. occurring or being done every three years < the triennial convention > 2. consisting of or lasting for three years < a triennial contract > • triennial noun • triennially adverb …   New Collegiate Dictionary

  • triennial — Cyclic Cyc lic (s?k l?k or s? kl?k), Cyclical Cyc lic*al (s?k l? kal), a. [Cf. F. cycluque, Gr. kykliko s, fr. ky klos See {Cycle}.] 1. Of or pertaining to a cycle or circle; moving in cycles; as, cyclical time. Coleridge. [1913 Webster] 2.… …   The Collaborative International Dictionary of English

  • Triennial — Continuing three years: happening every third year …   Wikipedia

  • triennial — triennially, adv. /truy en ee euhl/, adj. 1. occurring every three years. 2. lasting three years. n. 3. a third anniversary. 4. something that appears or occurs every three years. 5. a period of three years; triennium. [1555 65; TRIENNI(UM) +… …   Universalium

  • triennial — Synonyms and related words: amphibian, angiosperm, anniversary, annual, annual holiday, aquatic plant, biannual, bicentenary, bicentennial, biennial, bimonthly, birthday, bissextile day, biweekly, catamenial, centenary, centennial, commemoration …   Moby Thesaurus

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