What is the meaning of coating?

noun

• A thin layer covering something.
  • usage: "a second coat of paint"
  • synonyms: coat
• A decorative texture or appearance of a surface (or the substance that gives it that appearance. )
  • usage: "the boat had a metallic finish"; "he applied a coat of a clear finish"; "when the finish is too thin it is difficult to apply evenly"
  • synonyms: finish, finishing
• A heavy fabric suitable for coats.
• The work of applying something.
  • usage: "the doctor prescribed a topical application of iodine"; "a complete bleach requires several applications"; "the surface was ready for a coating of paint";
  • synonyms: application, covering

verb

• Put a coat on; cover the surface of; furnish with a surface.
  • usage: "coat the cake with chocolate"
  • synonyms: coat, surface
• Cover or provide with a coat.
  • synonyms: coat
• Form a coat over.
  • usage: "Dirt had coated her face"
  • synonyms: coat, cake