pen in
phrase
: to prevent (someone or something) from moving beyond a particular area
The prisoners were penned in by a high fence.
—often used figurativelyShe felt penned in by their relationship.
Cite this Entry
“Pen in.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pen%20in. Accessed 10 Mar. 2026.
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Merriam-Webster unabridged
