Meaning of the word "oil film" in English

What does "oil film" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

oil film

US /ˈɔɪl fɪlm/
UK /ˈɔɪl fɪlm/

Noun

a thin layer of oil, especially one floating on water or covering a surface

Example:
A rainbow-colored oil film was visible on the surface of the puddle.
The mechanic checked the engine for any signs of an oil film, which could indicate a leak.