triennial
Every third year
Triennial means occurring every three years or lasting three years.
A triennial review happens once every three years; a triennial term spans three years.
As a noun, a triennial is an event held every three years: The art triennial opens next month.
Compare biennial (two years) and quadrennial (four years).
Every four years
- quinquennialEvery fifth year
- decennialEvery ten years
- semiannualTwice per year
- biannualTwice per year
cyclical · recurrent · periodic · recurring · regular · intermittent · seasonal · recurring
Repeating sequence of events
- termFixed period or word
- periodPunctuation ending sentences
- spanDistance between endpoints
- durationLength of existence
timeframe · schedule · rotation · calendar · timeline · tenure · mandate · review
Public display of items
- conferenceOrganized meeting for discussion
- symposiumFormal expert discussion meeting
- festivalOrganized public celebration
- summitPeak or diplomatic gathering
forum · expo · fair · convention · competition · awards · survey · report
Act of honoring memory
- jubileeSpecial anniversary observance
- milestoneNotable event marking progress
- celebrationFestive event marking occasion
- ceremonyFormal event marking occasions
observance · memorial · remembrance · founding · charter · establishment · dedication
quadrennial
Every four years
- quinquennialEvery fifth year
- decennialEvery ten years
- semiannualTwice per year
biannual · cyclical · recurrent · periodic · recurring · regular · intermittent · seasonal · recurring · repetitive
cycle
Repeating sequence of events
duration · timeframe · schedule · rotation · calendar · timeline · tenure · mandate · review · assessment
exhibition
Public display of items
- conferenceOrganized meeting for discussion
- symposiumFormal expert discussion meeting
- festivalOrganized public celebration
summit · forum · expo · fair · convention · competition · awards · survey · report · review
commemoration
Act of honoring memory
- jubileeSpecial anniversary observance
- milestoneNotable event marking progress
- celebrationFestive event marking occasion
ceremony · observance · memorial · remembrance · founding · charter · establishment · dedication
third
Position number three
- art exhibitionsgalleries, art shows, exhibits, gallery shows, group show
- threestrio, triad, triple, triplet, trinity
- arts awardsart prize, grand prize, gold medal, silver medal, bronze medal
- art biennials
- exhibitionsexhibitions, exhibits, exhibit, exhibition, expo
- exposexpo, trade show, world's fair, auto show, boat show
triennialdaily
Per diem, repeated
weekly · continuous · annual · yearly · monthly
triennialnonperiodic
Not recurring at intervals
irregular · sporadic · one-time · non-recurring · random