The Collaborative International Dictionary of English v.0.48:
Pen \Pen\ (p[e^]n), n. [OE. penne, OF. penne, pene, F. penne,
fr. L. penna.]
1. A feather. [Obs.] --Spenser.
2. A wing. [Obs.] --Milton.
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
Graven with an iron pen and lead in the rock. --Job
4. Fig.: A writer, or his style; as, he has a sharp pen.
"Those learned pens." --Fuller.
5. (Zool.) The internal shell of a squid.
6. [Etymol. uncertain.] (Zool.) A female swan; -- contrasted
with cob, the male swan. [Prov. Eng.]
Bow pen. See Bow-pen.
Dotting pen, a pen for drawing dotted lines.
Drawing pen, or Ruling pen, a pen for ruling lines having
a pair of blades between which the ink is contained.
Fountain pen, Geometric pen. See under Fountain, and
Music pen, a pen having five points for drawing the five
lines of the staff.
Pen and ink, or pen-and-ink, executed or done with a pen
and ink; as, a pen and ink sketch.
Pen feather. A pin feather. [Obs.]
Pen name. See under Name.
Sea pen (Zool.), a pennatula. [Usually written sea-pen.]
WordNet (r) 3.0 (2006):
n 1: fleshy featherlike warm-water colonies