/ Dictionary / Index S simple extension: Meaning and Definition of Find definitions for: sim'ple exten'sion Pronunciation: [key] — Math. Math. an extension field of a given field, obtained by forming all polynomials in a specified element with coefficients contained in the given field. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. simple enumeration simple fraction 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