Definition of in steam in English:
in steam
phrase
(of a steam locomotive) ready for work, with steam in the boiler.
‘both of the engines were recently in steam’- ‘The heritage railway, which runs from Toddington to Cheltenham Racecourse, will have five Swindon-built locomotives in steam on Friday, Saturday and Sunday.’
- ‘Machine power, manifested in steam, internal combustion, and jet engines, provides strategic and tactical mobility and logistic lift to armed forces.’
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