'Undercoat' definitions:

Definition of 'undercoat'

From: WordNet
noun
Seal consisting of a coating of a tar or rubberlike material on the underside of a motor vehicle to retard corrosion [syn: undercoat, underseal]
noun
The first or preliminary coat of paint or size applied to a surface [syn: flat coat, ground, primer, priming, primer coat, priming coat, undercoat]
noun
Thick soft fur lying beneath the longer and coarser guard hair [syn: undercoat, underfur]
verb
Cover with a primer; apply a primer to [syn: prime, ground, undercoat]

Definition of 'Undercoat'

From: GCIDE
  • Undercoat \Un"der*coat`\, n.
  • 1. A coat worn under another; a light coat, as distinguished from an overcoat, or a greatcoat. [1913 Webster]
  • 2. A growth of short hair or fur partially concealed by a longer growth; as, a dog's undercoat. [1913 Webster]

Synonyms of 'undercoat'

From: Moby Thesaurus