Dictionary 1. (a.) Coming, or made, or done, once every half week; as, a semiweekly newspaper; a semiweekly trip.2. (n.) That which comes or happens once every half week, esp. a semiweekly periodical. 3. (adv.) At intervals of half a week each. Thesaurus annual biannual biennial bimonthly biweekly catamenial centenary centennial daily decennial diurnal fortnightly hebdomadal hourly menstrual momentary momently monthly quarterly quotidian secular semestral semiannual semimonthly semiyearly tertian triennial weekly yearly |