pen up

idiom

Definition of pen up

: to put or keep (a person or animal) in an enclosed area Several dogs were penned up behind the house. The men were penned up on the ship for months.

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“Pen up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pen%20up. Accessed 25 Oct. 2020.

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