Definition of MASK

  1. (noun)a covering to disguise or conceal the face
  2. (noun)activity that tries to conceal something
  3. (noun)a party of guests wearing costumes and masks
  4. (noun)a protective covering worn over the face
  5. (verb)hide under a false appearance
  6. (verb)put a mask on or cover with a mask
  7. (verb)make unrecognizable
  8. (verb)cover with a sauce
  9. (verb)shield from light