Semiannual means twice a year (or, technically, once every half a year). The word semiyearly means the same thing as semiannual. The words biannual and biyearly can be synonyms of semiannual, but they can also mean once every two years (every other year). ... The adverb form of semiannual is semiannually.

Is it semiannually or semi annually?

Semiannual means every six months since the prefix semi means every half year. This, however, is such a small distinction that it is widely accepted to use these terms interchangeably. Also, you may see this word with a hyphen, semi-annual, or written as two words with a space between each, semi annual.

What does semiannually mean?

Semiannual is an adjective that describes something that is paid, reported, published, or otherwise takes place twice each year, typically once every six months.