1. triennial

adjective. ['traɪˈɛniːəl'] occurring every third year or lasting 3 years.

Rhymes with Triennial

• bicentennial
• quadrennial
• centennial
• millennial
• decennial
• perennial
• biennial

Sentences with triennial

1. Adjective
Pharaohs took on the powers of divine kingship, and renewed their vows at the triennial festival of Sed.

2. triennial

noun. ['traɪˈɛniːəl'] the 300th anniversary (or the celebration of it).