a. and adv. [f. prec. + -LY.] A. adj. Happening or appearing once in a fortnight. B. adv. Once in a fortnight.

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1800.  Dundee Mag., Dec. Pref. He then published a Fortnightly Magazine which was carried on for two years.

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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.

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1854.  H. Miller, Sch. & Schm. (1858), 325. The masons at Niddry House were paid fortnightly.

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1881.  Macm. Mag., XLIII. April, 436/1. Fortnightly Sunday concerts are to be given next season.

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