1.  gangway(n = noun.artifact) - a temporary passageway of planks (as over mud on a building site);
is a kind of passageway

2.  gangway(n = noun.artifact) gangboard, gangplank - a temporary bridge for getting on and off a vessel at dockside;
is a kind of footbridge, overcrossing, pedestrian bridge

3.  gangway(n = noun.artifact) aisle - passageway between seating areas as in an auditorium or passenger vehicle or between areas of shelves of goods as in stores;
is a kind of passageway

1.  A passage or way into or out of any inclosed place; esp., a temporary way of access formed of planks. [1913 Webster]

2.  In the English House of Commons, a narrow aisle across the house, below which sit those who do not vote steadly either with the government or with the opposition. [1913 Webster]

3.  The opening through the bulwarks of a vessel by which persons enter or leave it. [1913 Webster]

4.  That part of the spar deck of a vessel on each side of the booms, from the quarter-deck to the forecastle; -- more properly termed the waist. Totten. [1913 Webster]

gangway, n. & int.
--n.
1 Brit. a passage, esp. between rows of seats.
2 a an opening in the bulwarks by which a ship is entered or left. b a bridge laid from ship to shore. c a passage on a ship, esp. a platform connecting the quarterdeck and forecastle.
3 a temporary bridge on a building site etc.
--int. make way!

N  method, way, manner, wise, gait, form, mode, fashion, tone, guise, modus operandi, MO, procedure, path, road, route, course, line of way, line of road, trajectory, orbit, track, beat, tack, steps, stair, staircase, flight of stairs, ladder, stile, perron, bridge, footbridge, viaduct, pontoon, steppingstone, plank, gangway, drawbridge, pass, ford, ferry, tunnel, pipe, door, gateway, channel, passage, avenue, means of access, approach, adit, artery, lane, loan, alley, aisle, lobby, corridor, back-door, back-stairs, secret passage, covert way, vennel, roadway, pathway, stairway, express, thoroughfare, highway, turnpike, freeway, royal road, coach road, broad highway, King's highway, Queen's highway, beaten track, beaten path, horse road, bridle road, bridle track, bridle path, walk, trottoir, footpath, pavement, flags, sidewalk, crossroad, byroad, bypath, byway, cut, short cut carrefour, private road, occupation road, highways and byways, railroad, railway, tram road, tramway, towpath, causeway, canal, street, speedway, adv, how, in what way, in what manner, by what mode, so, in this way, after this fashion, one way or another, anyhow, somehow or other, by way of, via, in transitu, on the high road to, hae tibi erunt artes.

N  opening, hole, foramen, puncture, perforation, fontanel, transforation, pinhole, keyhole, loophole, porthole, peephole, mousehole, pigeonhole, eye of a needle, eyelet, slot, opening, aperture, apertness, hiation, yawning, oscitancy, dehiscence, patefaction, pandiculation, chasm, embrasure, window, casement, abatjour, light, sky light, fan light, lattice, bay window, bow window, oriel, dormer, lantern, outlet, inlet, vent, vomitory, embouchure, orifice, mouth, sucker, muzzle, throat, gullet, weasand, wizen, nozzle, placket, portal, porch, gate, ostiary, postern, wicket, trapdoor, hatch, door, arcade, cellarway, driveway, gateway, doorway, hatchway, gangway, lich gate, way, path, thoroughfare, channel, passage, passageway, tube, pipe, water pipe, air pipe, vessel, tubule, canal, gut, fistula, adjutage, ajutage, ostium, smokestack, chimney, flue, tap, funnel, gully, tunnel, main, mine, pit, adit, shaft, gallery, alley, aisle, glade, vista, bore, caliber, pore, blind orifice, fulgurite, thundertube, porousness, porosity, sieve, cullender, colander, cribble, riddle, screen, honeycomb, apertion, perforation, piercing, terebration, empalement, pertusion, puncture, acupuncture, penetration, key, opener, master key, password, combination, passe- partout, open, perforated, perforate, wide open, ajar, unclosed, unstopped, oscitant, gaping, yawning, patent, tubular, cannular, fistulous, pervious, permeable, foraminous, vesicular, vasicular, porous, follicular, cribriform, honeycombed, infundibular, riddled, tubulous, tubulated, piped, tubate, opening, aperient, Int, open sesame!.