from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A protective or disguising cover for the face, often enveloping the entire head: wore a facemask while diving; a skier's facemask; armed robbers who wore facemasks.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a cover used to protect or disguise the face
face + mask (Wiktionary)