Home › Words › S › spacewalkerspacewalkerspacewalker · noun — an astronaut engaging in a space walk or other activity outside the spacecraft.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom space + walker. Analyzable as spacewalk + -er.nounAn astronaut engaging in a space walk or other activity outside the spacecraft.e.g.“NASA has spacewalkers periodically look at their gloves, since the discovery of a cut in a glove used by an astronaut during the last shuttle mission.” — 2007 August 16, Kenneth Chang, “Shuttle Crew Is Told to Study for Repairs, as NASA Wavers”, in The New York Times:Definitions & examples from Wiktionary (CC BY-SA 3.0).