/ Dictionary / Index R running fix: Meaning and Definition of Find definitions for: run'ning fix' Pronunciation: [key] — Navig. Navig. a fix made from a moving vessel or aircraft from observations made at different times, the course and distance run between the observations being considered. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. running English running gaff Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language