Definition from macmillandictionary.com
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Please keep your seat belts fastened while the seat belt light is on.
It was fastened with buttons down the front.
These trousers fasten with buttons.
We fastened our boat with rope to a post in the river.
She fastened the rope around her ankle.
I checked that all the windows were properly fastened.
I can’t get the back gate to fasten.
His hand moved swiftly to fasten on her arm.
She fastened her arms around my neck and hugged me tightly.