/ Dictionary / Index G Galileo: Meaning and Definition of Find definitions for: Gal•i•le•o Pronunciation: (gal"u-lā'ō, -lē'ō for 1 also It. gä"lē-le'ô), [key] — n. (Galileo Galilei), 1564–1642, Italian physicist and astronomer. a U.S. space probe designed to take photographs and obtain other scientific information while orbiting the planet Jupiter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: galileo (Thesaurus) galilee galimatias Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language