/ Dictionary / Index L level-off: Meaning and Definition of Find definitions for: lev•el-off Pronunciation: (lev'ul-ôf', -of'), [key] — n. Aeron. the maneuver of bringing an aircraft into a horizontal flying position after an ascent or descent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: level-off (Thesaurus) level line level of significance Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language