Noun Definitionoil1.Definition: a dark oil consisting mainly of hydrocarbonsRelated Noun(s):crude, petroleumCategory: General2.Definition: a slippery or viscous liquid or liquefiable substance not miscible with waterCategory: General3.Definition: any of a group of liquid edible fats that are obtained from plantsCategory: Food4.Definition: oil paint containing pigment that is used by an artistCategory: Objects