Breadcrumb Home > Dictionary > Index A arithmetic mean: Meaning and Definition of Find definitions for: ar'ithmet'ic mean' Pronunciation: [key] — Statistics. Statistics. the mean obtained by adding several quantities together and dividing the sum by the number of quantities:Also called the arithmetic mean of 1, 5, 2, and 8 is 4. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arithmetic/logic unit arithmetic progression TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: subrosa Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language