1. (a.) Occurring, done, or coming, once in two months; as, bimonthly visits; bimonthly publications.

2. (n.) A bimonthly publication.

3. (adv.) Once in two months.

Domesday Book account account book account rendered accounting acta address book adversaria album amphibian angiosperm appointment calendar appointment schedule aquatic plant biannual biennial bimonthly biweekly blankbook blotter brief bulletin calendar cashbook catalog catamenial census report centenary centennial classified catalog commonplace book cosmopolite court calendar cutting daily daybook decennial deciduous plant desk calendar diary dicot dicotyledon diptych diurnal docket election returns engagement book ephemeral ephemeris evergreen exotic flowering plant fortnightly fungus gametophyte gazette gymnosperm hebdomadal hourly hydrophyte journal ledger log logbook loose-leaf notebook magazine memo book memorandum book memory book menstrual minutes momentary momently monocot monocotyl monthly newsmagazine notebook organ pad perennial periodical petty cashbook pictorial plant pocket notebook pocketbook police blotter polycot polycotyl polycotyledon proceedings quarterly quotidian report returns review scrapbook scratch pad seasonal secular seed plant seedling semestral semiannual semimonthly semiweekly semiyearly serial slick magazine spermatophyte spiral notebook sporophyte statement table tablet tally tertian thallophyte the record trade magazine transactions triennial triptych vascular plant vegetable weed weekly workbook writing tablet yearbook yearly