/ Dictionary / Index L logarithmic function: Meaning and Definition of Find definitions for: log'arith'mic func'tion Pronunciation: [key] — Math. Math. a function defined by y = logx, esp. when the base, b, is equal to e, the base of natural logarithms. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. logarithmic logbook Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language