semimonthly

adj

1. (not-comparable)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”

adv

1. (not-comparable)In a manner occurring twice a month or at half month intervals.

   “They met semimonthly to discuss the latest developments.”

noun

1. Something done or made every half month, especially a periodical.