biannual

Every six months

Biannual means occurring twice a year: biannual dental checkups, The committee holds biannual meetings in spring and fall.

The word is sometimes confused with biennial, which means every two years.

When clarity matters, "twice yearly" or "every two years" may serve better than either term.

frequency

half-yearly

Twice per annum

twice-yearlyTwo times per annum
semiyearlyTwice per annum
bimonthlyEvery sixty days

quarterly · monthly · weekly · fortnightly · biweekly · yearly · periodic · recurring · regular · seasonal

events

conference

Organized meeting for discussion

conventionAgreed standard of behavior
summitPeak or diplomatic gathering
symposiumFormal expert discussion meeting

meeting · assembly · review · audit · report · checkup · inspection · evaluation · assessment · sale

cycles

solstice

Day of maximum tilt

equinoxSun crosses celestial midline
semesterHalf academic year
migrationMovement to new territory

flowering · harvest · monsoon · planting · breeding · molting · bloom · fruiting · renewal · dormancy

calendar

fiscal

Of public revenue

academicRelating to education or theory
mid-yearHalfway through the calendar
first-halfInitial portion of two

Categories

bi- wordsbiathlon, bicameral, bicentennial, bicycle, bifocals
event adjectivesscheduled, planned, recurring, upcoming, monthly
frequenciesdaily, weekly, monthly, yearly, quarterly
time cyclesseasonal cycle, yearly cycle, seasons, day, solar cycle
time periodsday, year, month, week, hour
lease termslease term, rental agreement, lease, rental contract, rent payment

Opposites

temporal regularity

biannualnonperiodic

Not recurring at intervals

irregular · sporadic · random · unpredictable · erratic

frequency rate

biannualdaily

Per diem, repeated

continuous · constant · weekly · perpetual · incessant

Family

Familiarity: Top 200,000
Profile: Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G