Wiktionary
n. (context military English) the tactical firing position of artillery or naval guns
Usage examples of "gun line".
She would learn that her anger could no longer frighten Lord John, for he had conquered fear by riding to the enemy's gun line and coming home.
A small dip in the ground helped to save them from the worst of the canister as they scrambled towards the smoke and the enemy's gun line.
If I push our gun line forward, they will come under artillery fire from the heights as they try to deploy, as well as from small arms.
Got them attacking with a feigned retreat barbs usually fell for that and then rolled them up when they stalled against his gun line.
The effort of speaking brought Ramage's memory back with a rush: it was a stupid question: everything was the matter when late one sunny September afternoon in the year of Our Lord 1796 a French 74-gun line-of-battle ship, the Barras, trapped His Majesty's frigate Sibella, of 28 guns.
Barlet, stalked the gun line on the upper deck, checking his guns and their crews.
All morning he had wandered restlessly between the ammunition park and the gun line where he had stared fixedly at the enemy and now, back from Vilar Formoso with a sour belly and a head thick with too much wine, he looked once again into Massé.
The dozen men had only been visible in the river's open bed for a few seconds, but someone in the Mahratta gun line was wide awake and there was a sudden and violent plume of water in the river and, almost simultaneously, the sky battering sound of a heavy gun.