folding knife

folding knife (plural folding knives)

1. A kind of knife whose blade or blades can be folded inside the handle, owing to a joint. Such a knife is usually a pocketknife; its action may be locking or nonlocking.

• clasp-knife, clasp knife, folder

• lock knife, locking knife
  • backlock, lockback, button lock, frame lock, liner lock, slipjoint
• Swiss Army knife

• EDC, everyday carry

• fixie, sheath knife