pen pen /ˈpɛn/

noun

1. () A writing implement with a point from which ink flows  ( pen )
   a writing implement with a point from which ink flows
    Can I borrow your pen, please? I seem to have lost mine
   Can I borrow your pen, please? I seem to have lost mine
   
   
2. () An enclosure for confining livestock  ( pen )
   an enclosure for confining livestock
    The pigs were kept in a pen made of sturdy metal bars
   The pigs were kept in a pen made of sturdy metal bars
   
   
3. Female swan  ( pen )
   female swan
    The pen gracefully swam across the pond with her cygnets following her.
   The pen gracefully swam across the pond with her cygnets following her.
   
   
4. [Informal, N. American] A correctional institution for those convicted of major crimes  ( pen [Informal, N. American] , penitentiary )
   a correctional institution for those convicted of major crimes
   
   
5. A portable enclosure in which babies may be left to play  ( pen , playpen )
   a portable enclosure in which babies may be left to play
    The baby is safe in the playpen while I do some work
   The baby is safe in the playpen while I do some work
   
   

verb

1. () Produce a literary work  ( indite [Archaic] , pen , compose , write )
   produce a literary work
    She composed a poem
   She composed a poem
    He wrote four novels
   He wrote four novels