ˈȯilə(r) noun
( -s )
1.
a. : one who is employed to do routine oiling and greasing of mechanical equipment (as in a mill, factory, power plant, railroad yard, or on a vessel)
b. : one who works oil or grease into hides or skins to soften and protect the leather
2. : an oilcan, oil cup, or other receptacle or device for applying oil to mechanical bearing surfaces : lubricator
3. : a producing oil well
4.
a. : a ship using oil as fuel
b. : an oil cargo ship : tanker
5. oilers plural : oilskins
6. : a device that automatically applies an oil or insecticide to the hide of a domestic animal that rubs against it