FORTNIGHTLY
fortnightly, biweekly
(adjective) occurring every two weeks
fortnightly, biweekly
(adverb) every two weeks; “he visited his cousins fortnightly”
Source: WordNet® 3.1
Etymology
Noun
fortnightly (plural fortnightlies)
A publication issued fortnightly (once every two weeks).
Synonym: biweekly
Adjective
fortnightly (not comparable)
occurring once in a fortnight; once every two weeks
Adverb
fortnightly (not comparable)
once in a fortnight; once every two weeks
Source: Wiktionary
Fort"night`ly, a.
Definition: Occurring or appearing once in a fortnight; as, a fortnightly
meeting of a club; a fortnightly magazine, or other publication.
– adv.
Definition: Once in a fortnight; at intervals of a fortnight.
Source: Webster’s Unabridged Dictionary 1913 Edition