/ Dictionary / Index E excess-profits tax: Meaning and Definition of Find definitions for: ex'cess-prof'its tax" Pronunciation: (ek'ses prof'its), [key] a tax on the profits of a business enterprise in excess of the average profits for a number of base years, or of a specified rate of return on capital. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. excessive excess sound pressure Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language