Grease is the thick oil you use to make a machine work more smoothly. It's also the shiny, slick substance produced by cooking something in fat, like the grease on that fried chicken you made.

As a verb, grease means to make something slick and oily so it can move more easily: "You should grease the hinges to stop the door from creaking." As a noun grease is the kind of oil or fat that's solid at room temperature, whether it's the grease you use to repair a car engine or the grease you use to deep fry onion rings. Colloquially, when you grease someone's palm, you offer them money as a bribe.

Definitions of grease
  1. noun
    a thick fatty oil (especially one used to lubricate machinery)
    synonyms: lubricating oil
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    axle grease
    a thick heavy grease used to lubricate axles
    type of:
    a slippery or viscous liquid or liquefiable substance not miscible with water
  2. noun
    the state of being covered with unclean things
    synonyms: dirt, filth, grime, grunge, soil, stain
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    type of:
    dirtiness, uncleanness
    the state of being unsanitary
  3. verb
    lubricate with grease
    grease the wheels”
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    type of:
    provide with a covering or cause to be covered
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