Source : Webster's Revised Unabridged Dictionary (1913)

Keelage \Keel"age\, n. [Cf. F. guillage, fr. guille keel; of
   German or Scand origin. See 3d {Keel}.]
   The right of demanding a duty or toll for a ship entering a
   port; also, the duty or toll. --Bouvier. Wharton.