3.An instrument used for writing with ink, formerly made of a reed, or of the quill of a goose or other bird, but now also of other materials, as of steel, gold, etc. Also, originally, a stylus or other instrument for scratching or graving. "Graven with an iron pen and lead in the rock."
4.Fig.: A writer, or his style; as, he has a sharp pen. "Those learned pens."
5.(Zool.) The internal shell of a squid.
6.(Zool.) A female swan; contrasted with cob, the male swan. (Prov. Eng.)