blowtorch UK /ˈbləʊˌtɔːtʃ/US /ˈbloʊˌtoɹt͡ʃ/noun 2verb 1forms 3 noun2 •A tool which projects a controlled stream of a highly flammable gas over a spark in order to produce a controlled flame. •(US, slang) A jet fighter.When the firecan jockeys have flown their blowtorches some 100,000 miles, the doctors take over for the ground physical. — 1949 verb1 •To apply a blowtorch to (something). formsblowtorched · blowtorching · blowtorches