Definition of Swiftly

Babylon English Dictionary
quickly, speedily; immediately, hastily; expeditiously, promptly
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Swiftly Definition from Arts & Humanities Dictionaries & Glossaries
English-Latin Online Dictionary
celeriter, velociter
Swiftly Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
(adv.)
In a swift manner; with quick motion or velocity; fleetly.
  
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
WordNet 2.0

Adverb
1. in a swift manner; "she moved swiftly"
(synonym) fleetly
(pertainym) fleet, swift