n. 1 tinder, combustible, kindling; fossil or nuclear fuel You must pay a lot for fuel to heat that big house 2 ammunition, encouragement, stimulus, incitement, provocation Her teasing him only provided more fuel for his passion 3 nourishment, nutriment, sustenance, food, nutrition The body needs more fuel on a cold day
v. 4 nourish, feed, sustain; stimulate, encourage, incite, provoke, inflame, exacerbate, excite U-235 is used to fuel the reactor Frustration fuels the flame of desire.