Definition

1. Noun:

   • A layer of thick, soft fur beneath longer, coarser guard hairs: In animals, the undercoat is the dense, insulating layer of fur closest to the skin.
   • A first or preparatory coat of paint or primer: In painting and finishing, an undercoat is an initial layer applied to a surface to prepare it for the final coats.
   • A protective sealant coating: A layer of tar or rubber-like material applied to the underside of a vehicle to prevent rust and corrosion.

2. Verb:

   • To apply a primer or preparatory coat: The action of covering a surface with an initial layer of paint or sealant.

Usage Examples

• Noun:

  • A dog's thick undercoat keeps it warm in winter.
  • Apply an undercoat of white paint before the final blue color.
  • The car's undercoat was damaged, leading to rust.

• Verb:

  • You must undercoat the bare wood before painting.
  • The mechanic recommended we undercoat the chassis.

Advanced Usage

• "to serve as an undercoat": to function as a preparatory layer.
  • This product can serve as an undercoat for both wood and metal surfaces.

Variants and Related Words

• Undercoating (n): The material used for an undercoat; the process of applying it.

  • The undercoating on the truck is very durable.

• Primer (n): A type of undercoat, specifically a preparatory paint.

  • Use a stain-blocking primer as your undercoat.

Synonyms

• Noun: Base coat, primer, ground coat, underfur.
• Verb: Prime, ground, prepare.

Related Phrases

• "double undercoat": Two layers of preparatory coating.

  • For best results on new drywall, use a double undercoat.

• "undercoat of fur": Specifically refers to the soft inner layer of an animal's coat.

  • The husky sheds its dense undercoat of fur every spring.

Noun

1. thick soft fur lying beneath the longer and coarser guard hair
2. the first or preliminary coat of paint or size applied to a surface
3. seal consisting of a coating of a tar or rubberlike material on the underside of a motor vehicle to retard corrosion

Verb

1. cover with a primer; apply a primer to