fire engine UK /faɪə(ɹ).ɛn.dʒɪn/US /faɪɚ.ɛn.dʒɪn/ noun2 •A vehicle used by firefighters to pump water to fight a fire. Typically, a fire engine carries a supply of water and has the ability to connect to an external water supply.A fire aboard TfW 175007, working a Holyhead-Cardiff Central service on February 8, closed the A483 road while five fire engines from Wrexham, Deeside, and Cheshire attended the scene. — 2023 •(no longer used) A steam engine.A plan somewhat similar to this was adopted by Smeaton in the boiler of his portable fire engine. — 1844 formsfire engines