Tracksuit/ˈtræksuːt/ Definition 1 of 1Pro Tip 1/3Informal Wear Tracksuits are casual attire, not suitable for formal events or most workplaces. Don't wear a tracksuit to a job interview; it's too informal. Pro Tip 2/3Athletic Connection Tracksuits are linked to sports and exercise, indicating a relaxed or athletic situation. The team wore matching tracksuits for the warm-up session. Pro Tip 3/3Comfort Focus Tracksuits are designed for comfort, often worn at home or in casual settings. She slipped into her tracksuit for a cozy evening at home.