post·​atom·​ic ˌpōst-ə-ˈtä-mik How to pronounce postatomic (audio)
: existing or occurring after the introduction of atomic weapons
the postatomic world
the postatomic age

Word History

First Known Use

1947, in the meaning defined above

Time Traveler
The first known use of postatomic was in 1947

Dictionary Entries Near postatomic

Cite this Entry

“Postatomic.” Dictionary, Merriam-Webster, Accessed 9 Jun. 2023.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!