"biweekly" in the noun sense
1. biweekly
a periodical that is published twice a week or every two weeks (either 104 or 26 issues per year)
"biweekly" in the adjective sense
1. fortnightly, biweekly
occurring every two weeks
2. semiweekly, biweekly
occurring twice a week
"biweekly" in the adverb sense
1. semiweekly, biweekly
twice a week
"he called home semiweekly"
2. fortnightly, biweekly
every two weeks
"he visited his cousins fortnightly"
Source: WordNet® (An amazing lexical database of English)
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