pen2

noun

• 1a small enclosure in which sheep, pigs, or other farm animals are kept: a sheep pen
• a number of animals in or sufficient to fill a pen:a pen of twenty-five Cheviots
• any small enclosure in which someone or something can be confined: she took the baby out of the pen and played with it
• a covered dock for a submarine or other warship: U-boat pens

• 2(in the West Indies) a farm or plantation.

verb (pens, penning, penned)

• put or keep (an animal) in a pen: it was the practice to pen the sheep for clipping these cattle need to be penned in at night
• (pen someone up/in) confine someone in a restricted space:they had been penned up day and night in the house