"bimonthly" in the noun sense
1. bimonthly
a periodical that is published twice a month or every two months (either 24 or 6 issues per year)
"bimonthly" in the adjective sense
1. semimonthly, bimonthly
occurring twice a month
"a semimonthly publication"
2. bimonthly, bimestrial
occurring every two months
"bimonthly visits"
"bimonthly" in the adverb sense
1. semimonthly, bimonthly
twice a month
"salaries are paid semimonthly"
2. bimonthly
every two months
"the bill was payable bimonthly"
Source: WordNet® (An amazing lexical database of English)
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