Undercoat [ ˈəndərˌkōt ]
A first layer of paint that is put on a surface in order to improve the appearance of the final one, or the paint used for this.
Explanation
Technical Meaning: It is a foundational layer of paint or coating applied directly to a surface before the final decorative coat. Its purpose is to improve adhesion, seal the surface, and provide a consistent base for the topcoat. Undercoats may also contain special formulations for stain blocking, rust prevention, or other surface-specific functions
Simple Meaning: Think of an undercoat as the first layer of paint you apply to a surface, like a wall or a piece of furniture. It’s like using a base layer to help the real paint stick better and look nicer
Definition in One Word: Primer
