/ Dictionary / Index E elementary function: Meaning and Definition of Find definitions for: el'emen'tary func'tion Pronunciation: [key] — Math. Math. one of a class of functions that is generally taken to include power, exponential, and trigonometric functions, their inverses, and finite combinations of them. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. elementary charge elementary particle Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language