/ Dictionary / Index P position line: Meaning and Definition of Find definitions for: posi'tion line" Pronunciation: [key] — Navig. Navig. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. position isomer position paper 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