semimonthly adjective 1adverb 1noun 1forms 1 adjective1 •Occurring twice a month or at half month intervals.The semimonthly meeting was scheduled for the second and fourth Tuesdays. Compare fortnightly, biweekly, semiweekly; not to be confused with bimonthly adverb1 •In a manner occurring twice a month or at half month intervals.They met semimonthly to discuss the latest developments. noun1 •Something done or made every half month, especially a periodical. formssemimonthlies
