#1 undercoat n. [underseal] seal consisting of a coating of a tar or rubberlike material on the underside of a motor vehicle to retard corrosion. wn
#2 undercoat v. [prime, ground] cover with a primer; apply a primer to. wn
#3 undercoat n. [flat coat, ground, primer, priming, primer coat, priming coat] the first or preliminary coat of paint or size applied to a surface. wn
#4 undercoat n. [underfur] thick soft fur lying beneath the longer and coarser guard hair. wn
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