Bolt
/bˈoʊlt/
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Definition
(noun) A (usually) metal fastener consisting of a cylindrical body that is threaded, with a larger head on one end. It can be inserted into an unthreaded hole up to the head, with a nut then threaded on the other end; a heavy machine screw.
Sentence Examples
A fool's bolt is soon shot.
The news hit me like a bolt from the blue.
CEFR Practice Quiz
A ____ of lightning flashed across the dark sky during the storm.