'space probe' definitions:

Definition of 'space probe'

From: WordNet
noun
A rocket-propelled guided missile that can escape the earth's atmosphere; makes observations of the solar system that cannot be made by terrestrial observation

Definition of 'space probe'

From: GCIDE
  • space probe \space" probe\, n. an unmanned rocket carrying instruments to explore objects or conditions in outer space; -- used mostly for vehicles travelling beyond the earth's gravitational field, rather than in orbital or suborbital flight. [PJC]

Synonyms of 'space probe'

From: Moby Thesaurus