Definitions

1. verb

to secure or attach something, especially with a fastener or by means of a fastening device

“She fastened her seatbelt before the plane took off.”

2. verb

to make something secure or fast, especially by tightening a fastener

“Can you fasten the loose screw on the chair?”

3. verb

to become or make something fast or secure

“The ship will fasten its moorings for the night.”

4. noun

the act of fastening or the state of being fastened

“The fastenings on the backpack were secure.”