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See also: fl, Fl, fl., Fl., and


Alternative forms[edit]


  • (file)


FL (plural FLs)

  1. Abbreviation of foreign language.
  2. (aviation) Abbreviation of flight level.
  3. (slang, now chiefly historical) Abbreviation of French letter.
    • 1954, Doris Lessing, A Proper Marriage, HarperPerennial 1995, p. 41:
      ‘Well, what did he recommend? Those effells are a pain in the neck, only for bachelors.’
    • 2005, Shilpa Agarwal, Haunting Bombay:
      Used and discarded Fls–French letters–floated in the slime, little opaque vessels carrying human seed into oblivion.
    • 2012, Ian McCall, Going Going Gone, page 94:
      You could buy FLs quietly in chemists' shops and often in barber shops.

Proper noun[edit]


  1. Florida, a state of the United States of America.
  2. Flevoland, a province of the Netherlands.