The Collaborative International Dictionary of English v.0.48:

Cinque Ports \Cinque" Ports`\ [Cinque + port.] (Eng. Hist.)
   Five English ports, to which peculiar privileges were
   anciently accorded; -- viz., Hastings, Romney, Hythe, Dover,
   and Sandwich; afterwards increased by the addition of
   Winchelsea, Rye, and some minor places.
   [1913 Webster]

   Baron of the Cinque Ports. See under Baron.
      [1913 Webster]