Space Age

US: (spās′āj′)

WordReference Random House Unabridged Dictionary of American English © 2025

Space′ Age′, 

1. Aerospace, Government the period in modern history characterized by space exploration, usually considered as beginning October 4, 1957, when the Soviet Union launched the first artificial satellite, Sputnik I, into orbit around the earth.

Also, space′ age′. 
space-age  (spās′āj′), adj. 

1. Aerospace, Government pertaining to or characteristic of the Space Age.
2. Aerospace, Government using the latest or most advanced technology or design.
3. modern;
   up-to-date;
   forward-looking.

• 1955–60

Collins Concise English Dictionary © HarperCollins Publishers::

space age noun

1. the period in which the exploration of space has become possible

adjective space-age

1. (usually prenominal) futuristic or ultramodern, esp when suggestive of space technology