What is the meaning of daub?

noun

• Material used to daub walls.
• A blemish made by dirt.
  • usage: "he had a smudge on his cheek"
  • synonyms: smudge, spot, blot, smear, smirch, slur
• An unskillful painting.

verb

• Coat with plaster.
  • usage: "daub the wall"
  • synonyms: plaster
• Apply to a surface.
  • usage: "daub paint onto the wall"
• Cover (a surface) by smearing (a substance. over it)
  • usage: "smear the wall with paint"; "daub the ceiling with plaster"
  • synonyms: smear