fuel
noun
uk/ˈfjuːəl/ us [ C or U ] NATURAL RESOURCES
a substance which is used to provide heat or power, usually by being burned:
oil, gas and other kinds of fuel
nuclear fuel
fossil fuels
fuel costs/prices Domestic fuel costs have risen sharply over the past few months.
The new exhaust system, it is claimed, will lower fuel consumption.
[ U ]
anything that keeps people's ideas or feelings active, or makes them stronger:
The news reports were designed to add fuel to the debate over interest rates.
fuel
verb [ T ]
uk/ˈfjuːəl/ us-ll- | US usually -l-to supply a system with a substance that can be burned to provide heat or power:
fuelled by sth Our heating system is fuelled by gas.
The company is working on the development of methane-fuelled vehicles.
to increase a feeling or a type of behaviour or make it stronger:
The rapid promotion of the director's son has itself fuelled resentment within the company.
The press release fuelled speculation that interest rates were about to rise.