A rigid structure projecting from the front of a bird's face, forming the jaws of certain animals, or the long sucking mouth of certain insects and invertebrates, as well as the upper part of a bivalve shell or the prolongation of certain univalve shells, and can also refer to any process resembling a bird's beak that terminates the fruit or other parts of a plant.

A projection or point-like structure, such as a promontory of land, a drip in architecture, a toe clip in farriery, a part of a ship, a beam used as a ram in ancient galleys, or an elongation on the head of certain butterflies.

A noun "beak" represents a pointed and large human nose, as well as a slang term for cocaine in southern england.

(slang, Britain) A justice of the peace; a magistrate.

(slang, British public schools) A schoolmaster (originally, at Eton).

(transitive) To strike with the beak.

(transitive) To seize with the beak.

(intransitive, Northern Ireland) To play truant.