Breadcrumb Home > Dictionary > Index A argon: Meaning and Definition of Find definitions for: ar•gon Pronunciation: (är'gon), [key] — n. Chem. a colorless, odorless, chemically inactive, monatomic, gaseous element that, because of its inertness, is used for filling fluorescent and incandescent lamps and vacuum tubes. Symbol: Ar; at. no.: 18; at. wt.: 39.948. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: argon (Thesaurus) Argolis Argonaut TrendingHere are the facts and trivia that people are buzzing about. The Book of Philippians: Summary Current Events This Week: May 2023 Preamble of the United Nations Charter Queen Victoria Books of the Bible: New Testament Books in Order The 88 Recognized Constellations ✖ Related Content Daily Word Quiz: foison Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language