Noun pen has 5 senses
  1. pen - a writing implement with a point from which ink flows
    --1 is a kind of
    writing implement
    --1 has parts: nib, pen nib
    --1 has particulars:
     ballpoint, ballpoint pen, ballpen, Biro; felt-tip pen, felt-tipped pen, felt tip, Magic Marker; fountain pen; quill, quill pen
    Derived form: verb pen1
  2. pen - an enclosure for confining livestock
    --2 is a kind of
    --2 has particulars:
     cow pen, cattle pen, corral; creep; fold, sheepfold, sheep pen, sheepcote; kraal; paddock; pinfold; rodeo; sty, pigsty, pigpen
  3. playpen, pen - a portable enclosure in which babies may be left to play
    --3 is a kind of enclosure
  4. penitentiary, pen - a correctional institution for those convicted of major crimes
    --4 is a kind of correctional institution
  5. pen - female swan
    --5 is a kind of
,Verb pen has 1 sense
  1. write, compose, pen, indite - produce a literary work; "She composed a poem"; "He wrote four novels"
    --1 is one way to create verbally
    Derived forms: noun pen1, noun penning1
    Sample sentence:
    Did he pen his major works over a short period of time?