swift

¹ American  

[swift] / swɪft /

adjective

swifter, swiftest

1. moving or capable of moving with great speed or velocity; fleet; rapid.

   a swift ship.

   Synonyms:

   speedy

2. coming, happening, or performed quickly or without delay.

   a swift decision.

   Synonyms:

   expeditious

3. quick or prompt to act or respond.

   swift to jump to conclusions.

4. Slang. quick to perceive or understand; smart; clever.

   You can't cheat him, he's too swift.

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adverb

1. swiftly.

noun

1. any of numerous long-winged, swallowlike birds of the family Apodidae, related to the hummingbirds and noted for their rapid flight.

2. tree swift.

3. spiny lizard.

4. Also called ghost moth.  Also called swift moth.  any of several brown or gray moths, the males of which are usually white, of the family Hepialidae, noted for rapid flight.

5. an adjustable device upon which a hank of yarn is placed in order to wind off skeins or balls.

6. the main cylinder on a machine for carding flax.

Swift ² American  

[swift] / swɪft /

noun

1. Gustavus Franklin, 1839–1903, U.S. meat packer.

2. Jonathan Isaac Bickerstaff, 1667–1745, English satirist and clergyman, born in Ireland.

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SWIFT ³ American  

[swift] / swɪft /

noun

1. Society for Worldwide Interbank Financial Telecommunication: an international consortium that routes instructions concerning transfer of funds between financial institutions.

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swift ¹ British  

/ swɪft /

adjective

1. moving or able to move quickly; fast

2. occurring or performed quickly or suddenly; instant

   a swift response

3. prompt to act or respond

   swift to take revenge

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adverb

1. 1. swiftly or quickly

   2. ( in combination )

      swift-moving

noun

1. any bird of the families Apodidae and Hemiprocnidae, such as Apus apus ( common swift ) of the Old World: order Apodiformes. They have long narrow wings and spend most of the time on the wing

2. (sometimes capital) a variety of domestic fancy pigeon originating in Egypt and Syria and having an appearance somewhat similar to a swift

3. short for swift moth

4. any of certain North American lizards of the genera Sceloporus and Uta that can run very rapidly: family Iguanidae (iguanas)

5. the main cylinder in a carding machine

6. an expanding circular frame used to hold skeins of silk, wool, etc

Swift ² British  

/ swɪft /

noun

1. Graham Colin. born 1949, English writer: his novels include Waterland (1983), Last Orders (1996), which won the Booker prize, and The Light of Day (2002)

2. Jonathan. 1667–1745, Anglo-Irish satirist and churchman, who became dean of St Patrick's, Dublin, in 1713. His works include A Tale of a Tub (1704) and Gulliver's Travels (1726)

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Related Words

See quick.

Other Word Forms

• Swiftian adjective
• swiftly adverb
• swiftness noun

Etymology

Origin of swift¹

First recorded before 900; Middle English (adjective and adverb), Old English (adjective); akin to Old English swīfan “to revolve,” Old Norse svīfa “to rove”; see swivel

Origin of SWIFT³

First recorded in 1970–75

Explanation

If you were the first one to reach the finish line in gym class, the coach might have called you swift. Swift means quick or fast-moving. A glance, a current, even a decision can be swift. You can use the adjective swift to describe things that move or happen rapidly and smoothly. Deciding to borrow a parent's car without permission could result in swift punishment. Foxes are so swift that if you leave the chicken coop open for a moment, one might slip in. Conversely, if innuendo sails over your head, your friends might say, “You’re not too swift on the uptake, are you?” A swift is also a small bird that looks a lot like a swallow.

Example Sentences

He noted the swift uptick in activity at North Korea’s central Yongbyon nuclear complex, including at a 5-megawatt reactor, a reprocessing unit and a light-water reactor.

From The Wall Street Journal • Apr. 17, 2026

But it didn't produce the swift, conclusive victory - over the PGA Tour and DP World Tour - that those behind the breakaway hoped.

From BBC • Apr. 16, 2026

So swift has been the rebound from recent lows for major equity indices like the S&P 500 and Nasdaq that one closely-watched indicator already suggests the market rally is getting a bit stretched.

From MarketWatch • Apr. 15, 2026

If peace prevails, jet fuel prices will ultimately come down, but it’s unlikely to be a swift return to normal.

From Barron's • Apr. 14, 2026

Laura stood at the window and watched Pa, big and swift and strong, walking away over the snow.

From "Little House in the Big Woods" by Laura Ingalls Wilder

Related Words

• abrupt
• expeditious
• hasty
• nimble
• quick
• rapid
• speedy
• sudden
• unexpected