gas line is a noun meaning "a queue of vehicles waiting to purchase gasoline". It carries 3 recorded senses.
a queue of vehicles waiting to purchase gasoline
a pipe that carries gasoline from a tank to a gasoline engine
“the car wouldn't start because dirt clogged the gas line”
Definitions, synonyms and semantic relations for gas line come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.