1. protective layers of paint, primer, or other material applied beneath a final coating
Usage: automotive; construction
2. the soft, dense fur beneath the outer coat of certain animals
Usage: zoology

Examples

• The car’s undercoatings help prevent rust and corrosion.
• Apply two undercoatings before painting the metal surface.
• The mechanic inspected the vehicle’s undercoatings for damage.
• Arctic foxes have thick undercoatings to keep them warm.
• The dog’s undercoatings shed heavily during spring.
• Professional painters always use quality undercoatings for durability.