from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A spacecraft carrying instruments intended for use in exploration of the physical properties of outer space or celestial bodies other than Earth.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An unmanned space vehicle designed to voyage beyond Earth orbit
from the GNU version of the Collaborative International Dictionary of English
- 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.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. 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
Sorry, no etymologies found.