Biweekly, the reader wrote, means something happens twice a week. Biweekly, the Associated Press Stylebook and other sources say, means something happens every other week. Biweekly, the Webster’s New World Dictionary (Fourth Edition) says, means “1) once every two weeks, 2) [Now rare] twice a week.” Two other dictionaries, Random House’s Webster’s College and Merriam-Webster’s Collegiate, give the definitions for biweekly as “once every two weeks” first and “twice a week” second. Those who hold that biweekly means every other week prefer semiweekly as the word for twice a week. Bimonthly and semimonthly have a similar distinction. But then[.....]