WordWeb Online

1. Deprived of life; no longer living
   "a lifeless body"
   - exanimate
    
2. Destitute or having been emptied of life or living beings
   "after the dance the littered and lifeless ballroom echoed hollowly"
    
3. Lacking animation or excitement or activity
   "it was a lifeless party until she arrived"
    
4. Not having the capacity to support life
   "a lifeless planet"

See also: dead, empty, lifelessly, lifelessness, unanimated

Encyclopedia: Lifeless