/ Dictionary / Index L leveling instrument: Meaning and Definition of Find definitions for: lev'eling in"strument Pronunciation: [key] — Survey. Survey. an instrument used to establish a horizontal line of sight, usually by means of a spirit level. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. levelheaded leveling rod Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language