- 1 [uncountable, countable] any material that produces heat or power, usually when it is burned solid fuel (= wood, coal, etc.) nuclear fuels a car with high fuel consumption Fuel bills for home heating are set to rise again in the fall. see also fossil fuel
- 2[uncountable] a thing that is said or done that makes something, especially an argument, continue or get worse The new information adds fuel to the debate over safety procedures. The revelations gave new fuel to angry opponents of the proposed law. His remarks simply added fuel to the fire/flames of her rage.
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