Pronunciation: (un'dur-kōt"), [key]
1. a coat or jacket worn under another.
2. Zool.a growth of short fur or hair lying beneath a longer growth.
3. an undercoating.
4. a coat of paint or the like applied under the finishing coat.
5. a paint, sealer, or the like specially prepared for use underneath a finishing coat.
to apply an undercoating to.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.