📒 to close or join together the two parts of something; to become closed or joined together
📒 to close something so that it will not open; to be closed in this way
📒 to fix something in a particular position
📒 to attach or tie one thing to another thing
📒 if you fasten your arms around somebody, your teeth into something, etc., or if your arms, teeth, etc. fasten around, into, etc. somebody/something, you hold the person/thing strongly with your arms, etc.
📒 if you fasten your eyes on somebody/something or your eyes fasten on somebody/something, you look at them for a long time