Breadcrumb Home > Dictionary > Index G Geiger: Meaning and Definition of Find definitions for: Gei•ger Pronunciation: (gī'gur), [key] 1882–1947, German physicist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: geiger (Thesaurus) Gehrig Geiger counter ✖ Related Content Daily Word Quiz: acronym Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language