Definitions

1. noun

A person or machine that oils something, especially a vehicle or machine

“The mechanic was the company’s chief oiler.”

2. verb

To oil something, especially a vehicle or machine

“The engineer oiler the engine before the big race.”

3. noun

A device that supplies oil to something, especially an engine

“The car’s oiler system needed to be replaced.”

4. verb

To supply oil to something, especially an engine

“The oiler the machine regularly to keep it running smoothly.”