a. and adv. [f. prec. + -LY.] A. adj. Happening or appearing once in a fortnight. B. adv. Once in a fortnight.
1800. Dundee Mag., Dec. Pref. He then published a Fortnightly Magazine which was carried on for two years.
1820. Lamb, Elia, Ser. I. South-Sea Ho. His fine suite of official rooms resounded fortnightly to the notes of a concert of sweet breasts, as our ancestors would have called them.
1854. H. Miller, Sch. & Schm. (1858), 325. The masons at Niddry House were paid fortnightly.
1881. Macm. Mag., XLIII. April, 436/1. Fortnightly Sunday concerts are to be given next season.