topcoat
nounUK /ˈtɒp.kəʊt/
US /ˈtɑːp.koʊt/
A topcoat is the last layer of paint you put on something to keep it safe and shiny.
Dad put a clear topcoat on the wooden table so it would not get scratched.
OTHER MEANINGS
2. A warm coat worn over other clothes.
She wore a heavy topcoat because it was snowing outside.
3. The outer coat of an animal's fur.
The dog's topcoat keeps it dry in the rain.
4. A final layer of nail polish.
Add a topcoat so your nail polish lasts longer.