Burn the midnight oil
verb
To work late into the night.
I have a big exam coming up, so I've been burning the midnight oil studying

Often appears as...
- burn the midnight oil studying
- burn the midnight oil working
Usage tips
Idiomatic
verb
To work late into the night.
I have a big exam coming up, so I've been burning the midnight oil studying

Often appears as...
- burn the midnight oil studying
- burn the midnight oil working
Usage tips
Idiomatic
Definition 1 of 1

Metaphorical Use
This phrase uses 'burning oil' metaphorically to mean working hard late at night.

During the project, we had to burn the midnight oil to meet the deadline.
Figurative Expression
It's a figurative way to say someone is staying up late, not literally burning oil.

She burned the midnight oil to finish her thesis.
Intensity Implied
Implies intense focus or effort, not just being awake at night.

He's burning the midnight oil every night to become a top athlete.
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