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1.
Any one who lived/lives in chicago knows what this means- its the sidewalk between two extremely close houses
i saw the bitch run through the gangway, only to jump the fence and meet my dog.
by Honky Cracker October 10, 2003
 
2.
Naval term used for the walkway to the ship from the warf.
Walking up the gangway to the ship
by Newey January 12, 2004