- a person trained for travelling in space
See also cosmonaut
WordReference Random House Learner's Dictionary of American English © 2026
as•tro•naut /ˈæstrəˌnɔt, -ˌnɑt/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- Aerospacea person trained for space flight.
as•tro•naut
(as′trə nôt′, -not′),USA pronunciation n.
- Aerospacea person engaged in or trained for spaceflight.
- 1925–30; astro- + (aero)naut, probably via French astronaute; see astronautical
Collins Concise English Dictionary © HarperCollins Publishers::
astronaut /ˈæstrəˌnɔːt/ n
'astronaut' also found in these entries (note: many are not synonyms or translations):
Aldrin
- aquanaut
- Armstrong
- backpack
- Collins
- cosmonaut
- debrief
- Glenn
- hydronaut
- -naut
- Peake
- Shepard
- taikonaut
- umbilical cord
- bean
- blast
- Borman
- carpenter
- Cernan
- chicken switch
- Conrad
- extravehicular
- extravehicular mobility unit
- faceplate
- Gagarin
- get
- mercury
- moonwalk
- payload specialist
- pressurize
- white
- Schirra
- Schmitt
- Slayton
- space man
- spacewalk
- spacewoman