English adjective: triennial | |||
1. | triennial occurring every third year or lasting 3 years | ||
Similar | periodic, periodical | ||
Antonyms | aperiodic, nonperiodic | ||
English noun: triennial | |||
1. | triennial (time) the 300th anniversary (or the celebration of it) | ||
Synonyms | tercentenary, tercentennial | ||
Broader (hypernym) | anniversary, day of remembrance | ||