/ Dictionary / Index P power series: Meaning and Definition of Find definitions for: pow'er se"ries Pronunciation: [key] — Math. Math. an infinite series in which the terms are coefficients times successive powers of a given variable, or times products of powers of two or more variables. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. power saw power set Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language