bimonthly (Adjective) — Occurring twice a month. ex. "a bimonthly publication"
bimonthly (Adjective) — Occurring every two months. ex. "bimonthly visits"
bimonthly (Noun) — A periodical that is published twice a month or every two months (either 24 or 6 issues per year).
bimonthly (Adverb) — Twice a month. ex. "salaries are paid bimonthly"
bimonthly (Adverb) — Every two months. ex. "the bill was payable bimonthly"