A knitted garment. / A session of knitting.

Identified as a specific type; famous, renowned. / Accepted, familiar, researched.

Any fact or situation which is known or familiar. / (algebra) A constant or variable the value of which is already determined.

past participle of know

The fact of knowing about something; general understanding or familiarity with a subject, place, situation etc.

(obsolete) To confess as true; to acknowledge.

A utensil or a tool designed for cutting, consisting of a flat piece of hard material, usually steel or other metal (the blade), usually sharpened on one edge, attached to a handle. The blade may be pointed for piercing.

(transitive) To cut with a knife. / (transitive) To use a knife to injure or kill by stabbing, slashing, or otherwise using the sharp edge of the knife as a weapon.

A knock-knock joke

(colloquial, often childish) A phrase used to introduce a "knock knock joke" / (colloquial, often childish) A phrase used in lieu of knocking (e.g. on the door), when it is not possible to knock.