/un"deuhr koht'/ , n.
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.
v.t.
6. to apply an undercoating to.
[ 1640-50; UNDER- + COAT ]