/ Dictionary / Index F first axiom of countability: Meaning and Definition of Find definitions for: first' ax'iom of countabil'ity Pronunciation: [key] — Math. Math. See under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. First Amendment First Balkan War Related Content Daily Word Quiz: ablution Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language