/ Dictionary / Index P power of attorney: Meaning and Definition of Find definitions for: pow'er of attor'ney Pronunciation: [key] — Law. Law. a written document given by one person or party to another authorizing the latter to act for the former. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. power of appointment power pack Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language