Definition of "fortnightly"

fortnightly

adjective
not comparable
1. Occurring once in a fortnight; once every two weeks.
adverb
not comparable
1. once in a fortnight; once every two weeks
  Quotations
  That's where my column appears, in the Greenville Herald, fortnightly.
  1970, Lee Smith, "Between the Lines", as reprinted in, 2010, Mrs. Darcy and the Blue-Eyed Stranger, 2011 paperback edition, page 184
noun
plural fortnightlies
1. A publication issued fortnightly (once every two weeks).