12 [countable] the direction or path along which someone or something moves or looks
He was so drunk he couldn’t walk in a straight line.
Deep snow is blocking the mountain roads that serve as supply lines for the rebels.
line of fire (=the direction in which weapons are fired): Though there is fighting nearby, the camp is not in the line of fire.
line of vision (=the direction in which someone is looking): I was standing right in his line of vision.
Synonyms and related words