/ Dictionary / Index P positional notation: Meaning and Definition of Find definitions for: posi'tional nota'tion Pronunciation: [key] a type of numeration in which the position of a digit affects its value. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. positional astronomy position effect Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language