biweekly /baɪˈwiːkli/adjective 2adverb 2noun 1forms 1 adjective2 •Occurring once every two weeks; fortnightly. •Occurring twice a week. adverb2 •Every two weeks. •Twice a week (but see the Usage notes). noun1 •Something that is published or released once every two weeks.The local paper is a biweekly. formsbiweeklies