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We found 17 dictionaries with English definitions that include the word pen up: Click on the first link on a line below to go directly to a page where "pen up" is defined. General (12 matching dictionaries) pen up: Vocabulary.com [home, info] pen up: Macmillan Dictionary [home, info] pen up: Dictionary.com [home, info] pen up: UltraLingua English Dictionary [home, info] pen up: Rhymezone [home, info] pen up: Free Dictionary [home, info] pen up: Mnemonic Dictionary [home, info] pen up: WordNet 1.7 Vocabulary Helper [home, info] pen up: LookWAYup Translating Dictionary/Thesaurus [home, info] pen up: Dictionary/thesaurus [home, info] Business (2 matching dictionaries) pen up: Legal dictionary [home, info] pen up: Financial dictionary [home, info] Computing (1 matching dictionary) pen up: Encyclopedia [home, info] Medicine (1 matching dictionary) pen up: Medical dictionary [home, info] Miscellaneous (1 matching dictionary) pen up: Idioms [home, info]

Quick definitions from WordNet (pen up) ▸ verb:  confine in a fold, like sheep