fasten
Americanverb (used with object)
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to attach firmly or securely in place; fix securely to something else.
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to make secure, as an article of dress with buttons, clasps, etc., or a door with a lock, bolt, etc.
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to enclose securely, as a person or an animal (usually followed byin ).
to fasten a monkey in a cage.
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to attach, associate, or connect.
to fasten a nickname on someone.
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to direct (the eyes, thoughts, etc.) intently.
to fasten one's eyes on a speaker.
verb (used without object)
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to become fast, fixed, or firm.
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to close firmly or securely; lock.
This clasp won't fasten.
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to take a firm hold; seize (usually followed by on orupon ).
to fasten on an idea.
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to focus attention; concentrate (usually followed by on orupon ).
His gaze fastened on the jewels.
verb
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to make or become fast or secure
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to make or become attached or joined
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to close or become closed by fixing firmly in place, locking, etc
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(tr; foll by in or up) to enclose or imprison
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to cause (blame, a nickname, etc) to be attached (to); place (on) or impute (to)
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to direct or be directed in a concentrated way; fix
he fastened his gaze on the girl
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take firm hold (of)
Other Word Forms
Etymology
Origin of fasten
before 900; Middle English fastenen, Old English fæstnian; cognate with Old Norse fastna to betroth; akin to fast 1
Explanation
When you fasten something, you close or attach it. You might fasten your coat, closing each snap, when the sun goes down and the air gets chilly. People fasten all kinds of things: we all fasten our seat belts when we board an airplane and fasten our bathrobes by tying them in the front. Your ski goggles might fasten onto your helmet, just as your boots fasten onto your skis. You can also say that you fasten your hair with a barrette or fasten a charm bracelet around your wrist. The Old English root is fæstnian, "make fast or firm."
Vocabulary lists containing fasten
"A Universe of Stars"
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
At designer Rowen Rose, a large orange stone was used to fasten a green or yellow scarf to a matching sweater.
From Barron's • Jan. 20, 2026
Raise your tray tables and your reclining seats, and fasten your seat belts.
From Los Angeles Times • May 20, 2025
After telling Ms Harris to fasten her seatbelt, Ms Buell said the soon-to-be Democratic nominee quipped, “I was born with a seatbelt.”
From BBC • Aug. 17, 2024
Mechanics had to use brute force to fasten them together, he said.
From Seattle Times • Apr. 9, 2024
“The captain requests that, for your safety, you should fasten your seatbelts,” a stewardess said.
From "Kaffir Boy: An Autobiography" by Mark Mathabane
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
