1. not formal, pompous, or overly serious; relaxed and approachable
Usage: informal
2. having fresh air; not poorly ventilated or stale

Examples

• The new boss has an unstuffy management style that makes everyone feel comfortable.
• I prefer unstuffy restaurants where I can wear jeans and sneakers.
• The professor’s unstuffy approach to teaching made the complex subject more accessible.
• After opening all the windows, the room felt bright and unstuffy.
• The company culture is refreshingly unstuffy compared to traditional corporations.
• We found an unstuffy café with outdoor seating and a relaxed atmosphere.