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burn the midnight oil

/bɜrn ðə ˈmɪdnaɪt ɔɪl/
phrase★Intermediate— work late into the night◆idiom
◆ What It Really Means
To work very late into the night, often on intellectual or creative tasks, implying dedication and effort.
¶ Literal Meaning
To physically burn oil in a lamp until the middle of the night.
Literal Breakdown
burnto consume fuel by fire+the midnight oiloil used in a lamp during the middle of the night
◇ Mental Image
A mental picture of a dim oil lamp burning late into the night, with a person hunched over a desk, working by its flickering light.
◈ When to Use
A student stays up until 2 AM studying for an important exam, with an oil lamp (or modern lamp) burning beside them.
◉ Cultural Note
The phrase originated in an era when oil lamps were the primary source of artificial light. It reflects the historical context of extended nighttime work before electric lighting became common.
informal

to work late into the night, often studying or completing tasks

The students burned the midnight oil before their final exams.

The students stayed up very late studying for their final exams.

He burned the midnight oil to meet the client's urgent request.

He worked late into the night to fulfill the client's urgent demand.

💡

Commonly used to describe working hard on intellectual or creative tasks, not physical labor.

Collocations

burn the midnight oil onwork late on a specific task or project

Synonyms

work latepull an all-nighterwork overtimestay up late

Antonyms

work normal hourscall it a dayknock off early

Related Phrases

pull an all-nighteridiom
to stay awake all night working or studying
burn the candle at both endsidiom
to work excessively or deplete one's energy by doing too much
work around the clockphrase
to work continuously without stopping

💡Pro Tip

When to use this idiom

Use 'burn the midnight oil' when someone works very late to complete an important task, especially intellectual work like studying, writing, or problem-solving. Avoid using it for physical labor or routine overtime.

⚡Gold Rule

Literal vs. figurative meaning

This is an idiom. Do not interpret it literally—it does not involve actual fire or oil, but rather describes working late into the night.

Context matters

This idiom is typically used to describe voluntary late-night work for important tasks, not forced overtime or sleep deprivation.

📖Word Origin

The phrase dates back to the 17th century when oil lamps were commonly used for late-night work. 'Burning the midnight oil' literally referred to using an oil lamp late into the night, symbolizing extended effort or study.

📝Usage Notes

This idiom is often used to praise someone's dedication or to explain why they are tired. It implies working hard on tasks that require mental effort rather than physical labor.

Word Breakdown

burn
to consume or use up (metaphorically, one's time or energy)
verb
+
the midnight oil
oil used in lamps, symbolizing late-night work
noun phrase
English Dictionary

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