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.
Origin: before 1000; Middle English lifles, Old English līflēas. Related forms
defunct. See dead
inactive, inert, passive; sluggish; spiritless.
1, 3. living. 4. lively.