What does "extravehicular" mean?

Relating to, on happening in, the space outside a vehicle, especially a spacecraft in space

What is a synonym for "extravehicular"?

Common synonyms include: spacewalking.

adj

adj ·Rare ·Advanced level

Adjective

1
Relating to, on happening in, the space outside a vehicle, especially a spacecraft in space not-comparable

"The formal name for the spacesuit used on the International Space Station is the Extravehicular Mobility Unit, or EMU."

From extra- + vehicular.