swift

noun7

1. •
   A small plain-colored bird of the family Apodidae that resembles a swallow and is noted for its rapid flight.
2. •
   A moth of the family Hepialidae, swift moth, ghost moth.
3. •
   Any of certain lizards of the genus Sceloporus.

   • As a guide to start your collection we'd suggest either iguanas, tejus, swifts, basilisks, horned toads or alligator lizards. — 1965
4. •
   Any of various fast-flying hesperiid butterflies.
5. •
   A light, collapsible reel used to hold a hank of yarn in order to wind off skeins or balls.
6. •
   The main cylinder of a carding-machine.
7. •
   (no longer used) The current of a stream.

adjective3

1. •
   Fast; quick; rapid.

   • The river’s swift current carried the boat downstream.
   • She gave a swift reply to his question.
2. •
   Capable of moving at high speeds.
3. •
   (informal) Quick-thinking; bright.

   • That's what limos do — advertise, and he should have known that. But, as I told you before, officer, he's not too swift. — 2011

adverb1

1. •
   (literary, no longer used) Swiftly.

   • Light boats sail swift, though greater hulks draw deep. — 1602

noun3

1. •
   Acronym of Structured What If Technique.
2. •
   Acronym of Stored Waveform Inverse Fourier Transform.
3. •
   Acronym of Stratospheric Wind Interferometer For Transport Studies.