Definition of lose steam
- Sales have lost steam in recent weeks.
: to bring to destruction
: to miss from one's possession or from a customary or supposed place
: a vapor arising from a heated substance
: the invisible vapor into which water is converted when heated to the boiling point
: the mist formed by the condensation on cooling of water vapor
: to give out as fumes : exhale
: to apply steam to
: to rise or pass off as vapor
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