What is the meaning of lifeless?

adjective

• Deprived of life; no longer living.
  • usage: "a lifeless body"
  • synonyms: exanimate
• Destitute or having been emptied of life or living beings.
  • usage: "after the dance the littered and lifeless ballroom echoed hollowly"
• Lacking animation or excitement or activity.
  • usage: "the party being dead we left early"; "it was a lifeless party until she arrived"
• Not having the capacity to support life.
  • usage: "a lifeless planet"