Definition of doubly adverb from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈdʌbli//
    ; NAmE NAmE//ˈdʌbli//
    (used before adjectives)
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  1. 1more than usual doubly difficult/hard/important I made doubly sure I locked all the doors when I went out.
  2. 2in two ways; for two reasons I was doubly attracted to the house—by its size and its location.
See the Oxford Advanced American Dictionary entry: doubly