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See more synonyms for perfectly on Thesaurus.com
  1. in a perfect manner or to a perfect degree: to sing an aria perfectly.
  2. completely; fully; adequately: This will suit my purpose perfectly. He’s perfectly happy to help out. She’s perfectly capable of making her own decision.
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Origin of perfectly

1275–1325; perfect + -ly; replacing Middle English parfitly, derivative of parfit (see perfect)


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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for perfectly


  1. completely, utterly, or absolutely
  2. in a perfect way; extremely well
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for perfectly


c.1300, from perfect + -ly (2).

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Online Etymology Dictionary, © 2010 Douglas Harper