noun
plural oils
[noncount] a thick, black liquid that comes from the ground and that is used in making various products (such as gasoline)
a type of oil that is used as a fuel to produce heat or light
a type of oil that makes the different parts in an engine, machine, etc., run smoothly
[count, noncount] :a liquid substance that comes from a plant or animal, that contains fat, and that is used in cooking
[count, noncount] :a smooth substance that is used on the skin, hair, or body to make it soft or healthy
a oils [plural] :oil paints
[count] :an oil painting
a/the squeaky wheel gets the oil
burn the midnight oil
verb
oils; oiled; oiling
[+ obj] :to put oil in or on (something)