The story
From the title of the 1948 science fiction novel Space Cadet, by Robert A. Heinlein.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A person in training to be a (generally military) astronaut. Full definition →
From the title of the 1948 science fiction novel Space Cadet, by Robert A. Heinlein.
Etymology from Wiktionary, CC BY-SA 4.0.