Deprived of life; dead; also, in a state of suspended animation.Not possessing life; inanimate; inorganic: as, lifeless matter.Destitute of power, force, vigor, or spirit; wanting animation or vital energy; dull; heavy; inactive; vapid; insipid: as, a lifeless style of oratory; lifeless movements.Destitute of living beings.Synonyms Defunct.Inert, torpid, sluggish, spiritless, passive; flat, frigid, pointless.