Line or lines could mean:
People:
In science and technology:
In transport:
In business:
In the military:
- Line (formation), a standard tactical formation of forces
- Line infantry, a line formation of infantrymen who were part of the "Line Regiments"
- Line of battle, in naval warfare, a line of warships, hence "ship of the line"
In sport:
In the arts:
The abbreviation LINE could mean: