(mainly US) Also called logway. a ramp for logs leading into a sawmill
5.
a main passage in a mine
6.
temporary planks over mud or earth, as on a building site
sentence substitute
7.
clear a path!
Word Origin and History for gangway
n.
Old English gangweg "road, passage, thoroughfare;" see gang (in its original sense) + way. As a command to clear way, attested by 1912, American English.