fleet

¹ American  

[fleet] / flit /

noun

1. the largest organized unit of naval ships grouped for tactical or other purposes.

2. the largest organization of warships under the command of a single officer.

3. a number of naval vessels or vessels carrying armed crew members.

4. a large group of ships, airplanes, trucks, etc., operated by a single company or under the same ownership.

   He owns a fleet of cabs.

5. a large group of airplanes, automobiles, etc., moving or operating together.

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fleet ² American  

[fleet] / flit /

adjective

fleeter, fleetest

1. swift; rapid.

   to be fleet of foot;

   a fleet horse.

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verb (used without object)

1. to move swiftly; fly.

2. Nautical. to change position; shift.

3. Archaic.

   1. to glide along like a stream.

   2. to fade; vanish.

4. Obsolete. to float; drift; swim.

verb (used with object)

1. to cause (time) to pass lightly or swiftly.

   Synonyms:

   beguile, hasten, speed

2. Nautical.

   1. to move or change the position of.

   2. to separate the blocks of (a tackle).

   3. to lay (a rope) along a deck.

fleet ³ American  

[fleet] / flit /

noun

British Dialect.

1. an arm of the sea; inlet.

2. a creek; stream; watercourse.

3. the Fleet, a former prison in London, long used for debtors.

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fleet ¹ British  

/ fliːt /

adjective

1. rapid in movement; swift

2. poetic fleeting; transient

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verb

1. (intr) to move rapidly

2. archaic (intr) to fade away smoothly; glide

3. (tr) nautical

   1. to change the position of (a hawser)

   2. to pass (a messenger or lead) to a hawser from a winch for hauling in

   3. to spread apart (the blocks of a tackle)

4. obsolete (intr) to float or swim

5. obsolete (tr) to cause (time) to pass rapidly

fleet ² British  

/ fliːt /

noun

1. a number of warships organized as a tactical unit

2. all the warships of a nation

3. a number of aircraft, ships, buses, etc, operating together or under the same ownership

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Fleet ³ British  

/ fliːt /

noun

1. a stream that formerly ran into the Thames between Ludgate Hill and Fleet Street and is now a covered sewer

2. Also called: Fleet Prison.  (formerly) a London prison, esp used for holding debtors

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fleet ⁴ British  

/ fliːt /

noun

1. a small coastal inlet; creek

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Other Word Forms

• fleetly adverb
• fleetness noun

Etymology

Origin of fleet¹

First recorded before 1000; Middle English flete, fleot(e), Old English flēot “bay, estuary; boat,” derivative of flēotan float ( def. ); fleet ²

Origin of fleet²

First recorded in 1520–30; probably from or akin to Old Norse fljótr “quick, speedy”

Origin of fleet³

First recorded before 900; Middle English flete, Old English flēot “flowing water”; cognate with German Fliess “brook”; fleet ³ def. 3 is so called after the Fleet a stream, later covered and used as a sewer, near which the prison was located; fleet ¹ ( def. )

Explanation

A fleet is usually a large group of ships, but it can be any group of vessels like planes or cars that operate as a unit. A naval fleet is the largest formation of warships. A naval fleet at sea is like an army on land. One meaning of fleet comes from the Old English fleot, meaning “ship,” “raft,” or “floating vessel.” Although a fleet is usually a group of ships or airplanes operating under the same ownership, any group of vessels sailing together can be called a fleet, even you and your friends in a fleet of kayaks. Another meaning of fleet originates in the Old English flēotan, which means “moving swiftly.” When it’s used in that way, it’s usually in the -ing form, fleeting.

Example Sentences

Early signs are that after years of dodging restrictions, the Iranian shadow fleet may have met its match in the U.S. naval blockade—its ships now appear unable to leave the Persian Gulf.

From The Wall Street Journal • Apr. 15, 2026

Uber plans to invest $10 billion in self-driving cabs, including $2.5 billion in equity stakes and $7.5 billion for its own fleet.

From Barron's • Apr. 15, 2026

The fleet ballooned to accommodate Russia’s huge oil flows after the 2022 invasion of Ukraine.

From The Wall Street Journal • Apr. 15, 2026

A combined company would also have to integrate complex union seniority lists; harmonize a massive fleet, which comprises both Boeing and Airbus jets; and face a web of co-branded card programs offered by each airline.

From MarketWatch • Apr. 14, 2026

The United States promised European allies a fleet of airplanes to be powered by the new 410-horsepower, twelve-cylinder Liberty engine.

From "A Few Red Drops: The Chicago Race Riot of 1919" by Claire Hartfield

Related Words

• armada
• flotilla
• navy
• squadron