astronautical

UK: /ˌæstrəʊˈnɔːtɪkəl/ US: (as′trə nô′ti kəl, -not′i-)

WordReference Random House Unabridged Dictionary of American English © 2026

as•tro•nau•ti•cal  (as′trə nô′ti kəl, -not′i-), adj. 

1. Aerospace of or pertaining to astronautics or astronauts.

Also, as′tro•nau′tic. 

• Greek naútēs sailor, on the model of aéronaute aeronaut) + -ique -ic) + -al¹
• French astronautique, equivalent. to astronaute (astro- astro- + -naute
• astronautic (

as′tro•nau′ti•cal•ly, adv. 

WordReference Random House Learner's Dictionary of American English © 2026

as•tro•nau•tics /ˌæstrəˈnɔtɪks, -ˈnɑtɪks/   n. [uncountable* used with a singular verb]

1. Aerospace the science and technology of space flight.

See -astro-.

WordReference Random House Unabridged Dictionary of American English © 2026

as•tro•nau•tics  (as′trə nô′tiks, -not′iks), n. (used with a sing. v.)

1. Aerospace the science of or technology involved in travel beyond the earth's atmosphere, including interplanetary and interstellar flight.

• see astronautical, -ics 1925–30

Collins Concise English Dictionary © HarperCollins Publishers::

astronautics / ˌæstrəˈnɔːtɪks/ noun

1. (functioning as singular) the science and technology of space flight

ˌastroˈnautic, ˌastroˈnautical adjective