/ Dictionary / Index L lifeless: Meaning and Definition of Find definitions for: life•less Pronunciation: (līf'lis), [key] — adj. not endowed with life; having no life; inanimate: lifeless matter. destitute of living things: a lifeless planet. deprived of life; dead: a battlefield strewn with lifeless bodies. without animation, liveliness, or spirit; dull; colorless; torpid: a lifeless performance of a play. insensible, as a person who has fainted. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lifeless (Thesaurus) life jacket lifelike Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language