undercoat

(-kōt′)

noun

  1. Obsolete a coat worn under another
  2. an under layer of short hair in an animal's coat
  3. a coating as of tarlike material applied to the exposed underside of a motor vehicle to deaden noise, retard rust, etc.
  4. a coat of paint, varnish, etc. applied as a first coat or before the final coat
Also (for undercoat & )undercoating

transitive verb

to apply an undercoat to

See undercoat in American Heritage Dictionary 4

noun
  1. A coat worn beneath another coat.
  2. A covering of short hairs lying underneath the longer outer hairs of an animal's coat.
  3. also un·der·coat·ing (-kōˌtĭng)
    a. A coat of sealing material applied to a surface before the outer coats, as of paint, are applied.
    b. The sealing material used for this purpose.
    c. A tarlike substance sprayed on the underside of a vehicle to prevent rusting.
transitive verb un·der·coat·ed, un·der·coat·ing, un·der·coats
To apply an undercoat to.

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