coveralls
nounUK /ˈkʌvərɔːlz/
US /ˈkʌvərɔːlz/
Coveralls are a one-piece suit you wear over your clothes to keep them clean while you work.
The mechanic put on his coveralls before fixing the car.
OTHER MEANINGS
2. Loose protective trousers with a bib and straps worn over other clothes.
He wore coveralls while painting the fence.
3. A full-body garment worn by pilots or astronauts.
The astronaut zipped up her coveralls before the launch.
4. Heavy-duty clothing worn to protect against dirt or spills.
Farmers often wear coveralls in the muddy fields.