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We found 40 dictionaries with English definitions that include the word breakthrough: Click on the first link on a line below to go directly to a page where "breakthrough" is defined. General (27 matching dictionaries) breakthrough: American Heritage Dictionary of the English Language [home, info] breakthrough: Collins English Dictionary [home, info] breakthrough: Vocabulary.com [home, info] breakthrough: Macmillan Dictionary [home, info] breakthrough: Merriam-Webster's Online Dictionary, 11th Edition [home, info] Breakthrough, breakthrough: Wordnik [home, info] breakthrough: Cambridge Advanced Learner's Dictionary [home, info] Breakthrough: Wiktionary [home, info] breakthrough: Compact Oxford English Dictionary [home, info] breakthrough: Webster's New World College Dictionary, 4th Ed. [home, info] breakthrough: The Wordsmyth English Dictionary-Thesaurus [home, info] breakthrough: Infoplease Dictionary [home, info] breakthrough: Dictionary.com [home, info] breakthrough: UltraLingua English Dictionary [home, info] breakthrough: Cambridge Dictionary of American English [home, info] Breakthrough (Colbie Caillat album), Breakthrough (Dutch political history), Breakthrough (Hope 7 song), Breakthrough (Mobile Suit Gundam), Breakthrough (Transnistria), Breakthrough (album), Breakthrough (board game), Breakthrough (disambiguation), Breakthrough (film), Breakthrough (human rights), Breakthrough (military), Breakthrough (single), Breakthrough (song), Breakthrough, The Breakthrough: Wikipedia, the Free Encyclopedia [home, info] breakthrough: Cambridge International Dictionary of Phrasal Verbs [home, info] breakthrough: Rhymezone [home, info] breakthrough: AllWords.com Multi-Lingual Dictionary [home, info] breakthrough: Free Dictionary [home, info] breakthrough: Mnemonic Dictionary [home, info] breakthrough: WordNet 1.7 Vocabulary Helper [home, info] breakthrough: LookWAYup Translating Dictionary/Thesaurus [home, info] breakthrough: Dictionary/thesaurus [home, info] breakthrough: Wikimedia Commons US English Pronunciations [home, info] Business (3 matching dictionaries) Breakthrough: MoneyGlossary.com [home, info] breakthrough: Financial dictionary [home, info] breakthrough: BusinessDictionary.com [home, info] Computing (1 matching dictionary) breakthrough: Encyclopedia [home, info] Medicine (3 matching dictionaries) breakthrough: online medical dictionary [home, info] breakthrough: Glossary of HIV/AIDS Related Terms [home, info] breakthrough: Medical dictionary [home, info] Slang (1 matching dictionary) Breakthrough: Urban Dictionary [home, info] Sports (1 matching dictionary) Breakthrough: Chess Dictionary [home, info] Tech (4 matching dictionaries) Breakthrough: Glossary of Coal Mining Terms [home, info] BREAKTHROUGH: Lake and Water Word Glossary [home, info] breakthrough: Schlumberger Oilfield Glossary [home, info] BREAKTHROUGH: Power Engineering [home, info]

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (breakthrough) ▸ noun:  making an important discovery ▸ noun:  a penetration of a barrier such as an enemy's defense ▸ noun:  a productive insight