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  1. MYSTERIOUS Definition & Meaning - Merriam-Webster

    The meaning of MYSTERIOUS is of, relating to, or constituting mystery. How to use mysterious in a sentence.

  2. MYSTERIOUS | definition in the Cambridge English Dictionary

    MYSTERIOUS meaning: 1. strange, not known, or not understood: 2. strange, not known, or not understood: . Learn more.

  3. MYSTERIOUS Definition & Meaning | Dictionary.com

    Mysterious, inscrutable, mystical, obscure refer to that which is not easily comprehended or explained. That which is mysterious, by being unknown or puzzling, excites curiosity, …

  4. MYSTERIOUS definition and meaning | Collins English Dictionary

    Someone or something that is mysterious is strange and is not known about or understood. He died in mysterious circumstances. A mysterious illness confined him to bed for over a month. …

  5. Mysterious - definition of mysterious by The Free Dictionary

    1. involving or full of mystery: a mysterious phone call. 2. suggesting or implying a mystery: a mysterious smile. 3. puzzling; inexplicable: a mysterious inscription on an ancient tomb.

  6. mysterious adjective - Definition, pictures, pronunciation ...

    Definition of mysterious adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

  7. mysterious - Wiktionary, the free dictionary

    Sep 2, 2025 · mysterious (comparative more mysterious, superlative most mysterious) Of unknown origin. synonym Synonym: untraceable He received a mysterious phone call this …