ship images. The Makin Island Raid (occurred on 17 - 18 August 1942) was an attack by the United States Marine Corps on Japanese military forces on Makin Island (now known as Butaritari Island) in the Pacific Ocean.
Biannual is derived from the prefix bi-, which means two, twice, double, doubly, as it comes from the Latin bi-, meaning twice, double, and annual comes from the Old French twelfth century word, annuel, which derives from the Latin annus, year.
Biweekly may refer to an event that occurs once every two weeks, or twice weekly. There are fifty-two full weeks in a year of twelve months, making for a possible 26 or 104 biweekly events in a year. This is a greater number than if such events were held twice a month, because most months have more than four weeks.iktionary (0.00 / 0 votes) Rate this definition: biweekly (Noun). Something that is published or released once every two weeks. The local paper is a biweekly. biweekly (Adverb). Every two weeks. biweekly (Adverb). Twice a week (but see the Usage notes). biweekly (Adjective).