Meanings
Originally referring to the act of burning oil in lamps for light and safety. The noun midnight oil is attested from mid 17th c.
How to pronounce "burn the midnight oil":
AU
To work studiously, especially late into the night.
Example: "He was burning the midnight oil to finish his paper."
Example: "She was burning the midnight oil to finish her part of the project."
Example Sentences
1
During exam week, I had to burn the midnight oil to finish all my assignments.
2
As a writer, I often burn the midnight oil to meet my deadlines.
3
I need to burn the midnight oil to finish this report for tomorrow's meeting.
4
Despite being tired, I had to burn the midnight oil to complete the project on time.
