Adjective marvellous has 3 senses
  1. fantastic, howling, marvelous, marvellous, rattling, terrific, tremendous, wonderful, wondrous - extraordinarily good; used especially as intensifiers; "a fantastic trip to the Orient"; "the film was fantastic!"; "a howling success"; "a marvelous collection of rare books"; "had a rattling conversation about politics"; "a tremendous achievement"
    Antonym: ordinary (indirect, via extraordinary)
  2. marvelous, marvellous, miraculous - being or having the character of a miracle
    Antonym: natural (indirect, via supernatural)
  3. improbable, marvelous, marvellous, tall - too improbable to admit of belief; "a tall story"
    Antonyms: credible, believable (indirect, via incredible)
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