Definition, Meaning & Synonyms

jackknife

noun
/ˈdʒæk.naɪf/
Definition
A type of folding knife that has one or more blades that can be folded into the handle.
Examples
  • He used a jackknife to whittle a piece of wood.
  • The chef pulled out a jackknife for his outdoor cooking.
  • She quickly opened her jackknife when she needed a tool.
Meaning
The term ‘jackknife’ refers not only to the knife itself but also to actions resembling the knife’s folding mechanism.
Synonyms
  • folding knife
  • pocket knife
  • multi-tool