Numb is an adjective that describes a lack of sensation. After skiing all day, your toes might be numb from the cold. You'd feel numb for hours after hearing that your favorite band broke up.

People can feel numb in terms of their feelings and emotions. For example, if you've had your heart broken lots of times, you start to become numb — the breakups don't upset you so much. Numb can also describe being so frightened that you can't move, like being numb with fear when you saw the bear near your campsite. Numb can also mean "to make insensitive," like when the dentist numbs your gums so you won't feel any pain.

Definitions of numb
  1. adjective
    lacking sensation
    numb with cold”
    synonyms: asleep, benumbed
    incapable of physical sensation
  2. adjective
    (followed by `to') not showing human feeling or sensitivity; unresponsive
    numb to the cries for mercy”
    synonyms: dead
    deficient in human sensibility; not mentally or morally sensitive
  3. adjective
    so frightened as to be unable to move; stunned or paralyzed with terror; petrified
    “too numb with fear to move”
    filled with fear or apprehension
  4. verb
    make numb or insensitive
    “The shock numbed her senses”
    synonyms: benumb, blunt, dull
    see moresee less
    type of:
    desensitise, desensitize
    cause not to be sensitive
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