Meaning of button lock | Babel Free

Definitions

1. A type of lock (for knives, and other tools, of folding or collapsing type) in which the lock is released with the press of a button, usually on the side of the handle; such a lock often allows the tool to be locked closed as well as locked open.
2. A knife or other tool with such a lock.
   metonymically

CEFR level