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We found 41 dictionaries with English definitions that include the word pernicious: Click on the first link on a line below to go directly to a page where "pernicious" is defined. General (33 matching dictionaries) pernicious: American Heritage Dictionary of the English Language [home, info] pernicious: Collins English Dictionary [home, info] pernicious: Vocabulary.com [home, info] pernicious: Macmillan Dictionary [home, info] pernicious: Merriam-Webster's Online Dictionary, 11th Edition [home, info] Pernicious, pernicious: Wordnik [home, info] pernicious: Cambridge Advanced Learner's Dictionary [home, info] pernicious: Wiktionary [home, info] pernicious: Webster's New World College Dictionary, 4th Ed. [home, info] pernicious: V2 Vocabulary Building Dictionary [home, info] pernicious: The Wordsmyth English Dictionary-Thesaurus [home, info] pernicious: Infoplease Dictionary [home, info] pernicious: Dictionary.com [home, info] pernicious: Online Etymology Dictionary [home, info] pernicious: UltraLingua English Dictionary [home, info] pernicious: Cambridge Dictionary of American English [home, info] Pernicious: Wikipedia, the Free Encyclopedia [home, info] Pernicious: Online Plain Text English Dictionary [home, info] pernicious: Webster's Revised Unabridged, 1913 Edition [home, info] pernicious: Rhymezone [home, info] Pernicious: AllWords.com Multi-Lingual Dictionary [home, info] pernicious: Webster's 1828 Dictionary [home, info] pernicious: Stammtisch Beau Fleuve Acronyms [home, info] pernicious: Hutchinson's Dictionary of Difficult Words [home, info] pernicious: Free Dictionary [home, info] pernicious: Hutchinson Dictionaries [home, info] pernicious: The Phrontistery - A Dictionary of Obscure Words [home, info] pernicious: Mnemonic Dictionary [home, info] pernicious: WordNet 1.7 Vocabulary Helper [home, info] pernicious: LookWAYup Translating Dictionary/Thesaurus [home, info] pernicious: Dictionary/thesaurus [home, info] Business (1 matching dictionary) pernicious: Legal dictionary [home, info] Computing (1 matching dictionary) pernicious: Encyclopedia [home, info] Medicine (4 matching dictionaries) pernicious: online medical dictionary [home, info] Pernicious: Hepatitis C Information Central [home, info] pernicious: Medical dictionary [home, info] pernicious: Hyperdictionary [home, info] Miscellaneous (1 matching dictionary) pernicious: A Word A Day [home, info] Slang (1 matching dictionary) pernicious: Urban Dictionary [home, info]

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (pernicious) ▸ adjective:  working or spreading in a hidden and usually injurious way ▸ adjective:  exceedingly harmful ▸ Word origin