adj ·Rare ·Advanced level

Definitions

Adjective

1. 1
   Synonym of quinquennial: occurring every five years. not-comparable, rare

   "The family had plans to attend the pentennial reunion."

Synonyms

All synonyms

quinquennialquinquennial

Example

More examples

"The family had plans to attend the pentennial reunion."

Etymology

From Ancient Greek πέντε (pénte, “five”) + Latin annus (“year”) + -ial.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.