What is the meaning of masking?

noun

• The act of concealing the existence of something by obstructing the view of it.
  • usage: "the cover concealed their guns from enemy aircraft"
  • synonyms: cover, covering, screening
• The blocking of one sensation resulting from the presence of another sensation.
  • usage: "he studied auditory masking by pure tones"
• Scenery used to block the audience's view of parts of the stage that should not be seen.
  • synonyms: masking piece

verb

• Hide under a false appearance.
  • usage: "He masked his disappointment"
  • synonyms: dissemble, cloak, mask
• Put a mask on or cover with a mask.
  • usage: "Mask the children for Halloween"
  • synonyms: mask
• Make unrecognizable.
  • usage: "The herb masks the garlic taste"; "We disguised our faces before robbing the bank"
  • synonyms: disguise, mask
• Cover with a sauce.
  • usage: "mask the meat"
  • synonyms: mask
• Shield from light.
  • synonyms: mask, block out