A boiler suit consists of a single piece of clothing that combines trousers and a jacket. You wear it over your clothes in order to protect them from dirt while you are working.
[British]regional note: in AM, use overalls
boiler suit in American English
British
coveralls
Examples of 'boiler suit' in a sentence
boiler suit
And some parents think a job in engineering means wearing a boiler suit and carrying a monkey wrench.
Times, Sunday Times (2014)
A subconscious desire on the part of men to punish women for wearing boiler suits and getting out of the house during the war?
Times, Sunday Times (2010)
The drunken mob, all wearing yellow boiler suits, spotted the emergency vehicle parked outside a pub as they left it.