Definitions
1.NounSubstance consumed to provide energy through combustion, or through chemical or nuclear reaction.
2.NounSubstance that provides nourishment for a living organism; food.
3.NounSomething that stimulates, encourages or maintains an action."His books were fuel for the revolution.; Money is the fuel for economy.; That film was nightmare fuel!"
4.VerbTo provide with fuel.
5.VerbTo exacerbate, to cause to grow or become greater.