1. a sealed protective garment worn by astronauts in space that provides air pressure, oxygen, and protection from radiation and temperature extremes

Examples

• The astronaut put on her spacesuit before the spacewalk.
• Modern spacesuits are equipped with life support systems.
• The spacesuit protected him from the vacuum of space.
• She practiced moving in the bulky spacesuit during training.
• The museum displayed an authentic Apollo-era spacesuit.
• His spacesuit helmet fogged up during the mission.