English Reference
noun · verb

steam

n. · v.
US /ˈstim/ UK /stˈiːm/ steam UK spelling steams

  1. 01 B1 Intermediate Science

    n.the hot mist or gas that rises from boiling water.

    n.the hot gaseous form of water or the visible cloud of condensate formed when water vapour meets cooler air.

    Simple

    Be careful when you open the pot, as the hot steam can burn your skin.

    In context

    A thick cloud of steam rose from the geothermal vent, obscuring the hikers' view of the valley floor for several minutes.

  2. 02 B2 Upper Intermediate Informal

    n.the energy or speed you have when doing something.

    n.metaphorical energy, momentum, or motive power required for progress.

    Simple

    The project started well, but it began to lose steam after the first month.

    In context

    The campaign gained significant steam following the endorsement from the local community leaders, leading to a surge in volunteer applications.

  3. 03 C1 Advanced Informal

    v.to move somewhere very quickly and with a lot of energy or anger.

    v.to move with great purposefulness or speed, often implying a lack of regard for obstacles.

    Simple

    He was so angry that he steamed out of the room without saying goodbye.

    In context

    The heavy locomotive steamed through the countryside, its rhythmic chugging audible from miles away across the open plains.

  4. 04 B2 Upper Intermediate

    v.to become covered in tiny drops of water so you cannot see through it.

    v.to become covered with condensed water vapour, typically referring to glass surfaces.

    Simple

    The bathroom mirror always steams up when I take a hot shower.

    In context

    The car windows began to steam up rapidly as the temperature outside dropped, forcing the driver to turn on the defroster.

He also defined the temperature at which water boils and turns into steam to be 212 degrees F.

The Conversation· 24 Aug 2026

From Middle English steem, stem, from Old English stēam (“steam, hot exhalation, hot breath; that which emits vapour; blood”), from Proto-Germanic staumaz (“steam, vapour, breath”), from Proto-Indo-European dʰewh₂- (“to whirl, waft, stink, shake; steam, haze, smoke”). Cognate with Scots stem, steam (“steam”), West Frisian steam (“steam, vapour”), Dutch stoom (“steam, vapour”), Low German stom (“steam”), Swedish dialectal stimma (“steam, fog”), Latin fūmus (“smoke, steam”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin ine-pro *dʰewh₂-
Level B2 · Upper Intermediate
Frequency Common
Updated