WordReference Random House Unabridged Dictionary of American English © 2026
ter•ra•form
(ter′ə fôrm′),USA pronunciation v.t.
- Aerospace, Astronomyto alter the environment of (a celestial body) in order to make capable of supporting terrestrial life forms.
- 1975–80; terra + form; perh. taken as verb, verbal use of an adjective, adjectival with -form as second element