from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A loose-fitting jacket and pants worn by athletes and exercisers usually before and after workouts.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a garment, usually consisting of a top and trousers (commonly known as tracksuit bottoms) worn as an outer layer by participants in sporting events such as athletics. The tracksuit is usually designed to be easily removed or replaced, before or after competing. Tracksuits have also been adopted in some cultures as leisurewear.
track + suit (Wiktionary)