motor oil

1. 1.

   oil used to lubricate the moving parts of a motor

   Broaderoillubricant

Questions about motor oil

What does motor oil mean?

motor oil means "oil used to lubricate the moving parts of a motor".

Is motor oil a common word?

motor oil is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.