Final answer:
GMAW stands for Gas Metal Arc Welding, a process that uses an electric arc and shielding gas to weld metals.
Step-by-step explanation:
The abbreviation GMAW stands for Gas Metal Arc Welding. This is a welding process where an electric arc forms between a consumable wire electrode and the workpiece metal(s), which heats the workpiece metal(s), causing them to melt and join. Along with the wire electrode, a shielding gas is also fed through the welding gun, which shields the process from contaminants in the air.