knife

A knife is a tool consisting of a blade attached to a handle, designed to cut or pierce materials. The blade may have a plain edge, a serrated edge, or a combination of both, and is usually made of metal.

Knives are produced in many forms. Kitchen knives include chef's knives, paring knives, and utility knives. Outside the kitchen, folding knives, fixed-blade hunting knives, and specialized blades such as boning or filleting knives are common. Blades are typically forged or stamped from steel, while handles use wood, plastic, or composite materials.

The knife predates the use of metal and originated as a chipped-stone tool. Metal knives appeared in the Bronze and Iron Ages, enabling stronger edges. By the Middle Ages and into the Industrial era, production methods allowed more standardized and durable blades.

Uses span food preparation, outdoor tasks, crafts, and everyday utility work. Some knives are designed as weapons or ceremonial items in certain cultures.

Maintenance includes regular cleaning, drying, and sharpening or honing to maintain a sharp edge. Safe handling and proper storage, such as a sheath or knife block, reduce accidents. Legal restrictions on possession and carry vary by country and jurisdiction.