self-shutting tool
nounUK /ˌself ˈʃʌtɪŋ tuːl/
US /ˌself ˈʃʌtɪŋ tuːl/
A tool that closes by itself when you let go of it.
The self-shutting tool snapped shut as soon as she put it down.
RELATED WORDS
OTHER MEANINGS
2. A software utility that closes its own windows or processes automatically.
The self-shutting tool cleared the pop-ups before they piled up.
3. A machine part that returns to a closed position without help.
The self-shutting tool on the press keeps fingers away from the blades.
4. A gadget designed to fold itself away for easy storage.
This self-shutting tool fits neatly in the drawer when you're done.