port
 oxford
 views  updated May 29 2018port5 red (also white) wine of 
Portugal. XVII. Short for †
Oporto wine, later †
Oporto, †
Porto, prop. wine from Oporto (Pg. 
O Porto ‘the port’; see 
PORT1), the chief port of shipment for Portuguese wines.
  The Concise Oxford Dictionary of English Etymology T. F. HOAD