/buy munth"lee/ , adj., n., pl. bimonthlies , adv.
adj.
1. occurring every two months.
2. occurring twice a month; semimonthly.
n.
3. a bimonthly publication.
adv.
4. every two months: Next year we plan six field trips to take place bimonthly.
5. twice a month; semimonthly.
[ 1840-50; BI- 1 + MONTHLY ]
Usage . See bi- 1 .