BIWEEKLY
semiweekly, biweekly
(adjective) occurring twice a week
fortnightly, biweekly
(adjective) occurring every two weeks
fortnightly, biweekly
(adverb) every two weeks; “he visited his cousins fortnightly”
semiweekly, biweekly
(adverb) twice a week; “he called home semiweekly”
biweekly
(noun) a periodical that is published twice a week or every two weeks (either 104 or 26 issues per year)
Source: WordNet® 3.1
Etymology
Adjective
biweekly (not comparable)
Occurring once every two weeks.
(chiefly, British) Occurring twice a week (but see the Usage notes).
Usage notes
Like bimonthly and biennially, but unlike biannually, in the adjective and adverb senses, the prefix bi- applies to the week rather than to the events that occur, therefore giving the sense of “every two weeks”. Since the term is also used in the UK to mean “twice a week”, it is ambiguous there. In British English, for the sake of clarity, it is advisable to use one of the synonyms instead. Furthermore, in some English speaking regions, the term fortnightly is also commonly used to describe an event happening once every two weeks.
Synonyms
• (occurring once every two weeks): fortnightly, twi-weekly
• (occurring twice a week): twice-weekly, semiweekly
Adverb
biweekly (not comparable)
Every two weeks.
(chiefly, British) Twice a week (but see the Usage notes).
Synonyms
• (every two weeks): fortnightly
• (twice a week): twice weekly, semi-weekly
Noun
biweekly (plural biweeklies)
Something that is published or released once every two weeks.
Source: Wiktionary
Bi"week`ly, a. Etym: [Pref. bi- + weekly.]
Definition: Occurring or appearing once every two weeks; fortnightly.
– n.
Definition: A publication issued every two weeks.
– Bi"week"ly, adv.
Source: Webster’s Unabridged Dictionary 1913 Edition