decennial adjective & noun. [dɪ'sɛnɪǝl] M17.
[from Latin DECENNIUM + -AL¹.]
A. adjective. Of or pertaining to a period of ten years; lasting ten years; occurring every ten years; (of a person) holding office for ten years. M17.
b. noun. (The celebration of) a decennial anniversary. US. L19.

■ decennal adjective = DECENNIAL adjective M17-E18.

■ decennially adverb L19.

[TahlilGaran] English Dictionary ▲