Usually means: Quickly, with great speed; rapidly.
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We found 13 dictionaries that define the word fastly:

General (12 matching dictionaries)
  1. fastly: Merriam-Webster
  2. fastly: Collins English Dictionary
  3. fastly: Vocabulary.com
  4. fastly: Wordnik
  5. fastly: Wiktionary
  6. Fastly: Dictionary.com
  7. Fastly: Wikipedia, the Free Encyclopedia
  8. Fastly: Online Plain Text English Dictionary
  9. fastly: Webster's Revised Unabridged, 1913 Edition
  10. Fastly: AllWords.com Multi-Lingual Dictionary
  11. fastly: FreeDictionary.org
  12. Fastly: TheFreeDictionary.com

Slang (1 matching dictionary)
  1. fastly: Urban Dictionary

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Definitions from Wiktionary (fastly)

▸ adverb:  In a secure or firm manner; securely
▸ adverb:  (now nonstandard) quickly

Similar:
fast, firmly, securely, solidly, safely, assuredly, steadfastly, squarely, tightly, speedily, more...

Opposite:
slowly, gradually, little by little

Types:
quickly, speedily, promptly, expeditiously, hastily, more...



▸ Words similar to fastly

▸ Usage examples for fastly

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▸ Words that often appear near fastly

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Similar:
fast, firmly, securely, solidly, safely, assuredly, steadfastly, squarely, tightly, speedily, more...

Opposite:
slowly, gradually, little by little

Types:
quickly, speedily, promptly, expeditiously, hastily, more...



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