/ Dictionary / Index G germproof: Meaning and Definition of Find definitions for: germ•proof Pronunciation: (jûrm'prf"), [key] — adj. not vulnerable to the action or penetration of germs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. germ plasm germ theory Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language