any material that produces heat or power, usually when it is burnt

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.

to supply something with material that can be burnt to produce heat or power

The helicopter was already fuelled (up) and ready to go.

to increase something; to make something stronger

Yesterday's meeting is likely to fuel further speculation about a takeover.

Higher salaries helped to fuel inflation.

LEARNit Dictionary