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noun B2 Upper-Intermediate Common

bolt

bolt

Bolt (noun) means a metal fastener with a threaded shaft, used with a nut to hold things together. Example: “He tightened the bolts on the shelf bracket.”

noun
1
A metal fastener with a threaded shaft, used with a nut to hold things together.
"He tightened the bolts on the shelf bracket."
2
A sliding bar used to lock a door.
"She slid the bolt shut before going to bed."
3
A flash of lightning.
"A bolt of lightning split the old oak tree."
verb
1
To run away suddenly, or move very fast.
"The dog bolted the second the gate opened."
"He bolted out of the room when his phone rang."
2
To fasten something with a bolt, or to lock a door with a bolt.
"Make sure you bolt the shed at night."
3
Of a plant, to grow flower stalks and go to seed too early.
"The lettuce bolted in the summer heat."

How to use bolt

Learner’s notes

In plain EnglishA metal fastener, a door lock, a lightning flash, or (as a verb) to run off suddenly.

Common mistake

Don't confuse a "bolt" (threaded fastener needing a nut) with a "screw" (which threads directly into material).

Easily confused with
Common pairings
bolt the door bolt of lightning bolt upright nuts and bolts

Word forms

bolted past tense, bolted past tense, bolts plural, bolts plural, Bolts plural, bolts singular, bolts singular

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Test yourself on “bolt” A quick quiz — meaning, synonyms & usage

Fill the gap

Can you complete this real example?

He tightened the _____ on the shelf bracket.

Etymology

From Old English bolt, a Germanic word for an arrow or short shaft — the sense of a sudden dash or a lightning strike grew from the idea of something shooting out fast, like an arrow.

Origin: Old English

Related words

Rhymes for bolt

See all rhymes for bolt →

Frequently asked questions

What does “bolt” mean?

The word “bolt” means a metal fastener with a threaded shaft, used with a nut to hold things together. In plain terms, a metal fastener, a door lock, a lightning flash, or (as a verb) to run off suddenly.

How do you pronounce “bolt”?

“Bolt” is pronounced bolt (/boʊlt/ in IPA).

How do you use “bolt” in a sentence?

Here is “bolt” used in a sentence: “He tightened the bolts on the shelf bracket.”

What part of speech is “bolt”?

Depending on how it is used, “bolt” can be a noun and a verb.

Where does the word “bolt” come from?

The word “bolt” comes from Old English. From Old English bolt, a Germanic word for an arrow or short shaft — the sense of a sudden dash or a lightning strike grew from the idea of something shooting out fast, like an arrow.

Is “bolt” a common word?

“Bolt” is a fairly common word in modern English, usually learned at around the B2 level.

How many meanings does “bolt” have?

“Bolt” has 6 distinct senses listed in this dictionary. The most common is: a metal fastener with a threaded shaft, used with a nut to hold things together.

What is the difference between a bolt and a screw?

A bolt is a metal fastener with a threaded shaft that passes through the parts being joined and is secured with a nut. A screw usually cuts its own thread into the material and holds without a nut. As a rule of thumb, if it needs a nut to clamp things together, it is a bolt.

What is the difference between a bolt and a latch on a door?

A bolt is a sliding bar that you move across to lock a door. A latch is a catch that simply holds the door closed and opens with a handle, without locking it. Many doors combine the two: a latch for everyday use and a bolt for security.

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Definitions: FreeDict original editorial