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  1. ISN'T | English meaning - Cambridge Dictionary

  2. Is Not | Definition & Meaning - Merriam-Webster

  3. When does `isn't ...` expand to "is ... not" and "is not ..."

  4. ISN'T | meaning - Cambridge Learner's Dictionary

  5. ISN'T definition in American English | Collins English Dictionary

  6. "It isn't" vs. "it's not" - English Language & Usage Stack Exchange

  7. Isn't Definition & Meaning - Merriam-Webster

  8. isn’t - Oxford Learner's Dictionaries

  9. No or not ? - English Grammar Today - Cambridge Dictionary

  10. NOT definition and meaning | Collins English Dictionary