GNU Collaborative International Dictionary of English

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Found one definition

1.       
   Doubly (dŭbly̆), adv.
   1. In twice the quantity; to twice the degree; as, “doubly wise or good; to be doubly sensible of an obligation.”  Dryden.
   
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   2. Deceitfully. “A man that deals doubly.”  Huloet.
   
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