1. (

• undercoat ,
• underseal

) seal consisting of a coating of a tar or rubberlike material on the underside of a motor vehicle to retard corrosion ;

2. (

• flat_coat ,
• ground ,
• primer ,
• priming ,
• primer_coat ,
• priming_coat ,
• undercoat ,

) the first or preliminary coat of paint or size applied to a surface ;

3. (

• undercoat ,
• underfur

) thick soft fur lying beneath the longer and coarser guard hair ;

1. (

• prime ,
• ground ,
• undercoat

) cover with a primer; apply a primer to ;