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• fleet
  fleet

  noun

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

  noun

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

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. ); cf. 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

IBM: As a cornerstone of the quantum ecosystem, Big Blue offers cloud-based access to its vast quantum fleet and maintains Qiskit, an open-source development kit enabling users to build quantum computing programs.

From Barron's • May 15, 2026

Amazon is also setting plans for a devices-connectivity business, using the satellite fleet it is deploying.

From The Wall Street Journal • May 14, 2026

Iridium’s fleet of low-Earth-orbit satellites underpin Aireon’s operations, hosting payloads that allow the venture to collect data from aircraft.

From The Wall Street Journal • May 14, 2026

At one point in April, 10 vessels from its 32-strong ferry fleet were out of action due to technical faults, annual overhauls or crewing issues.

From BBC • May 13, 2026

Running on fleet, silent feet down the Street of the Crooked Dog, he felt frightened but jubilant.

From "The Golden Goblet" by Eloise Jarvis McGraw

Related Words

• armada
• flotilla
• navy
• squadron