Wiktionary
n. Any knife used for preparing food
Wikipedia
A kitchen knife is any knife that is intended to be used in food preparation. While much of this work can be accomplished with a few general-purpose knives – notably a large chef's knife, a tough cleaver, and a small paring knife – there are also many specialized knives that are designed for specific tasks. Kitchen knives can be made from several different materials.
Usage examples of "kitchen knife".
He needed a means of self-defense, even if it was just a kitchen knife.
The average family owned nothing machine-made except for a kitchen knife.
Grace peeled the hard plastic bubble away from her kitchen knife and tested its sharpness by cutting the tags off her purchases.
I pulled out my hunting knife -- the kitchen knife was in the pirogue -- and I spun round to face the stairs.