Dictionary 1. (a.) Occurring or appearing once in a fortnight; as, a fortnightly meeting of a club; a fortnightly magazine, or other publication.2. (adv.) Once in a fortnight; at intervals of a fortnight. Thesaurus annual biannual biennial bimonthly biweekly catamenial centenary centennial daily daybook decennial diary diurnal ephemeris gazette hebdomadal hourly journal magazine menstrual momentary momently monthly newsmagazine organ periodical pictorial quarterly quotidian review secular semestral semiannual semimonthly semiweekly semiyearly serial slick magazine tertian trade magazine triennial weekly yearbook yearly |