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adj. swift·er, swift·est
1. Moving or capable of moving with great speed; fast. See Synonyms at fast1.
2. Coming, occurring, or accomplished quickly: a swift retort.
3. Quick to act or react: swift to take revenge.
Swiftly. Often used in combination: swift-running.
a. A cylinder on a carding machine.
b. A reel used to hold yarn as it is being wound off.
2. Any of various small dark insect-eating birds of the family Apodidae, having long pointed wings and a short forked tail, and noted for their swift flight.
3. Any of various small, fast-moving North American lizards, especially of the genus Sceloporus.
[Middle English, from Old English.]
(Nautical Terms) nautical a line run around the ends of capstan bars to prevent their falling out of their sockets
[C17: related to the nautical term swift to fasten with tight-drawn ropes; probably Scandinavian in origin: compare Old Norse svipta to reef]