Tip 14: Biannual/Semiannual & Biweekly/Semiweekly

When to use ‘biannual/semiannual’ and ‘biweekly/semiweekly’ ‘Biannual’ and ‘semiannual’ both mean twice a year. ‘Biennial’ means every two years. ‘Biweekly’ meetings occur every two weeks. ‘Semiweekly’ meetings occur twice a week. Since most people can’t keep them straight, just say “every other week” or “twice weekly.” A note from our Editor Question: “As ‘bimonthly’ means…