What is the meaning of numb?

verb

• Make numb or insensitive.
  • usage: "The shock numbed her senses"
  • synonyms: benumb, blunt, dull

adjective

• Lacking sensation.
  • usage: "my foot is asleep"; "numb with cold"
  • synonyms: asleep, benumbed
• Followed by `to'. ( not showing human feeling or sensitivity; unresponsive)
  • usage: "passersby were dead to our plea for help"; "numb to the cries for mercy"
  • synonyms: dead
• So frightened as to be unable to move; stunned or paralyzed with terror; petrified.
  • usage: "too numb with fear to move"