Using bi or semi in front of time periods can cause tremendous confusion. Looking the following words up in the dictionary will not help. Here’s what you’ll find:
Biweekly means once every two weeks or twice a week.
Bimonthly means once every two months or twice a month.
In addition, a biweekly publication is issued every two weeks and a bimonthly publication is issued every two months.
Semiweekly means twice a week.
Semimonthly means twice a month.
To avoid confusion, you may want to substitute the actual time frame for these confusing terms.
For example, say, “I visit my aunt every two weeks,” not “I visit my aunt bimonthly.” If you mean every two weeks, you may also say, “I visit my aunt semimonthly.”
Posted on Tuesday, July 29, 2008, at 1:14 am139 Comments on Bi vs. Semi (weekly, monthly, annually)