| Noun | 1. | bimonthly - a periodical that is published twice a month or every two months (either 24 or 6 issues per year) |
| Adj. | 1. | bimonthly - occurring twice a month; "a semimonthly publication" periodic, periodical - happening or recurring at regular intervals; "the periodic appearance of the seventeen-year locust" |
| 2. | bimonthly - occurring every two months; "bimonthly visits" periodic, periodical - happening or recurring at regular intervals; "the periodic appearance of the seventeen-year locust" | |
| Adv. | 1. | bimonthly - twice a month; "salaries are paid semimonthly" |
| 2. | bimonthly - every two months; "the bill was payable bimonthly" |