Pronunciation: (līf'lis), [key]
1. not endowed with life; having no life; inanimate: lifeless matter.
2. destitute of living things: a lifeless planet.
3. deprived of life; dead: a battlefield strewn with lifeless bodies.
4. without animation, liveliness, or spirit; dull; colorless; torpid: a lifeless performance of a play.
5. insensible, as a person who has fainted.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.