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The definition of nebulous

3 Definitions of: nebulous

    1. adjective, lacking definite form, shape, or content; vague or amorphous
    2. adjective, of, characteristic of, or resembling a nebula
    3. adjective, misty or hazy
    4. Show me some examples of this word: nebulous
    5. Show me the etymology of the word: nebulous

From Collins