bimonthly

• POS: Adjective, Noun, Adverb
• HYPHEN: bi=month=ly

CIDE DICTIONARY

bimonthly, a. [Pref. bi- + monthly.].

 Occurring, done, or coming, once in two months; as, bimonthly visits; bimonthly publications.  [1913 Webster]

bimonthly, adv. 

 Once in two months.  [1913 Webster]

OXFORD DICTIONARY

bimonthly, adj., adv., & n.
--adj. occurring twice a month or every two months.
--adv. twice a month or every two months.
--n. (pl. -ies) a periodical produced bimonthly.

Usage

Often avoided, because of the ambiguity of meaning, in favour of two-monthly and twice-monthly.

ROGET THESAURUS

bimonthly

Periodicity

N regularity of recurrence, periodicity, intermittence, beat, oscillation, pulse, pulsation, rhythm, alternation, alternateness, alternativeness, alternity, bout, round, revolution, rotation, turn, say, anniversary, jubilee, centenary, catamenia, courses, menses, menstrual flux, rota, cycle, period, stated time, routine, days of the week, Sunday, Monday, months of the year, January, feast, fast, Christmas, Easter, New Year's day, Allhallows, Allhallowmas, All Saints' Day, All Souls', All Souls' Day, Ash Wednesday, bicentennial, birthday, bissextile, Candlemas, Dewali, groundhog day, Halloween, Hallowmas, Lady day, leap year, Midsummer day, Muharram, woodchuck day, St. Swithin's day, natal day, yearbook, yuletide, punctuality, regularity, steadiness, periodic, periodical, serial, recurrent, cyclical, rhythmical, recurring, intermittent, remittent, alternate, every other, hourly, diurnal, daily, quotidian, tertian, weekly, hebdomadal, hebdomadary, biweekly, fortnightly, bimonthly, catamenial, monthly, menstrual, yearly, annual, biennial, triennial, centennial, secular, paschal, lenten, regular, steady, punctual, regular as clockwork, periodically, at regular intervals, at stated times, at fixed established, at established periods, punctually, de die in diem, from day to day, day by day, by turns, in turn, in rotation, alternately, every other day, off and on, ride and tie, round and round.