From Longman Dictionary of Contemporary EnglishMark 2/6 etcMark 2/6 etc (also mark 2/6 etc) a) TYPE especially British English a particular type or model of a car, machine etc an old Mark 2 Ford Cortina b) TMTDHa measurement used in Britain for the temperature of a gas oven Cook for 40 minutes at gas mark 6. → mark
Examples from the Corpus
gas mark• The heat in Keegan's kitchen barely rose above gas mark one.• Place pan in a preheated hot oven 200 °C gas mark 6.• Return pan to oven and increase heat to 220 °C gas mark 7. 