from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A usually long-sleeved, collarless, oversize pullover made traditionally of heavy cotton jersey that has a fleeced backing.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A loose shirt, usually made of a knit fleece, for athletic wear and now often used as casual apparel.
- n. A shirt worn against the skin, usually under other clothing, to absorb sweat.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. cotton knit pullover with long sleeves worn during athletic activity
From sweat + shirt. (Wiktionary)