Meaning : All of the armament that is fired from one side of a warship.
Meaning : The whole side of a vessel from stem to stern.
Example :
The ship was broadside to the dock.
Meaning : The simultaneous firing of all the armament on one side of a warship.
Meaning : With a side facing an object.
Example :
The train hit the truck broadside.
The wave caught the canoe broadside and capsized it.