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• cannon
  cannon

  noun

  a mounted gun for firing heavy projectiles; a gun, howitzer, or mortar.
• Cannon
  Cannon

  noun

  Annie Jump 1863–1941, U.S. astronomer.

cannon

¹ American  

[kan-uhn] / ˈkæn ən /

noun

• cannons,
  plural
• cannon
  plural

1. a mounted gun for firing heavy projectiles; a gun, howitzer, or mortar.

2. British Machinery. quill.

3. Armor. a cylindrical or semicylindrical piece of plate armor for the upper arm or forearm; a vambrace or rerebrace.

4. Also called canon bit.  Also called cannon bit,.  a round bit for a horse.

5. the part of a bit that is in the horse's mouth.

6. (on a bell) the metal loop by which a bell is hung.

7. Zoology.

   1. cannon bone.

   2. the part of the leg in which the cannon bone is situated.

8. British. a carom in billiards.

9. Underworld Slang. a pickpocket.

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verb (used without object)

• cannons,
  present (3rd person singular)
• cannoned,
  past participle,  past
• cannoning
  present participle

1. to discharge cannon.

2. British. to make a carom in billiards.

Cannon ² American  

[kan-uhn] / ˈkæn ən /

noun

1. Annie Jump 1863–1941, U.S. astronomer.

2. Joseph Gurney Uncle Joe, 1836–1926, U.S. politician and legislator.

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cannon British  

/ ˈkænən /

noun

1. an automatic aircraft gun of large calibre

2. history a heavy artillery piece consisting of a metal tube mounted on a carriage

3. a heavy tube or drum, esp one that can rotate freely on the shaft by which it is supported

4. the metal loop at the top of a bell, from which it is suspended

5. See cannon bone

6. billiards

   1. a shot in which the cue ball is caused to contact one object ball after another

   2. Usual US and Canadian word: carom.  the points scored by this

7. a rebound or bouncing back, as of a ball off a wall

8. either of the two parts of a vambrace

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verb

1. to collide (with)

2. short for cannonade

3. (intr) billiards to make a cannon

Cannon Scientific  

/ kăn′ən /

1. American astronomer noted for her work on classifying stellar spectra. Cannon classified the spectra of 225,300 stars brighter than magnitude 8.5, as well as 130,000 fainter stars.

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Other Word Forms

Inflected Forms

Nouns

• cannon
  plural
• cannons
  plural

Participles

• cannoning
  present
• cannoned
  past

Conjugated Forms

Present

• cannon
  simple
• cannons
  simple
• have cannoned
  perfect
• has cannoned
  perfect
• am cannoning
  progressive
• are cannoning
  progressive
• is cannoning
  progressive
• have been cannoning
  perfect progressive
• has been cannoning
  perfect progressive

Past

• cannoned
  simple
• had cannoned
  perfect
• was cannoning
  progressive
• were cannoning
  progressive
• had been cannoning
  perfect progressive

Future

• will cannon
  simple
• will have cannoned
  perfect
• will be cannoning
  progressive
• will have been cannoning
  perfect progressive

Etymology

Origin of cannon

First recorded in 1375–1425 (earlier in Anglo-Latin, Anglo-French ); late Middle English canon, from Middle French, from Italian cannone, equivalent to cann(a) “tube” (from Latin ) + -one augmentative suffix; see cane

Explanation

A cannon is a large gun that fires heavy metal shells or other projectiles. Originally it was attached to wheels and pulled by men. More recently, cannon refers to the largest gun on a tank or the automatic guns on a plane. All cannons, however old they are, have basically the same shape — a long, thick tube. Not surprising, then, that the term comes from the Latin word canna, meaning "tube" or "reed." Do not confuse with the word canon, with one n, which is a term of classification, as in its most common usage, "the literary canon."

Example Sentences

See Examples For:

cannon Cannon cannons cannoned cannoning

Technology is a part of war’s landscape; it separates the 21st century from the eras of the Brown Bess musket, the bronze cannon and the M-1 Garand rifle.

From The Wall Street Journal ● Aug. 18, 2026

On “So Unanchored,” Barberie has revived her loose cannon role in their dynamic, raw and unfiltered.

From Los Angeles Times ● Aug. 4, 2026

Two other ships, the BRP Datu Cabaylo and the BRP Cape San Agustin, were also targeted with water cannon but not hit, the coast guard said.

From Barron's ● Jul. 24, 2026

CAMBRIDGE, England—Every summer, students here line up in dozens of boats, wait for a cannon to fire, then pelt around the narrow bends of the River Cam trying to smash the crew in front.

From The Wall Street Journal ● Jul. 19, 2026

The sounds of distant cannon fire reached them, but there was no splintering of wood, no splash of iron in the water.

From "The Reader" by Traci Chee

Meanwhile, UK Politics Simulator, "built on real UK data down to ward level", is reportedly due out later this year for PC, made by the Scarborough-based company Black Cannon Games.

From BBC ● Aug. 15, 2026

Cannon mentioned these allegedly plagiarized words and phrases included “tears,” “running,” “fire,” “rain,” “sky,” “love,” “invisible,” “caged me,” “flesh and blood” and “it’s time to go.”

From Los Angeles Times ● Jul. 9, 2026

I guess they’re hoping to get Judge Aileen Cannon.

From Slate ● May 26, 2026

In September, they went to Macquarie to bring forward instalments due from the transfers of Tom Cannon, Kasey McAteer and James Justin.

From BBC ● Apr. 21, 2026

At last, just as Vilthuril was about to go on with the story, they heard hooves on the turf and the horseman appeared from the west, cantering easily along the track toward Cannon Heath Down.

From "Watership Down: A Novel" by Richard Adams

According to the Associated Press, Berlin police used water cannons — normally used to disperse protesters — to cool down cheering crowds in front of the Brandenburg Gate.

From Los Angeles Times ● Jul. 6, 2026

They left behind more than 40 loaded cannons, provisions and “some of that scoundrel Common Sense man’s letters, which we can read at our leisure.”

From The Wall Street Journal ● Jun. 29, 2026

Benjamin Franklin managed to convince George Clinton, New York’s governor, to supply Philadelphia with cannons, which the city lacked.

From The Wall Street Journal ● Jun. 28, 2026

The Berlin police used water cannons to help residents of the capital cool off for a second day running Sunday -- this time at the Olympia venue where singer Bruno Mars was performing.

From Barron's ● Jun. 28, 2026

But there were definitely cannons going off in my brain, just like Mr. Winston had been talking about.

From "Patina" by Jason Reynolds

Dimarco almost scored himself on 18 minutes but his free-kick cannoned back off the crossbar.

From Barron's ● Feb. 8, 2026

Ibrahima Konate made a complete hash of a pass inside his own half, allowing Ricardo Pepi to race clear for a shot that cannoned back off the post to Driouech, who gleefully slotted home.

From Barron's ● Nov. 26, 2025

Turnbull's spot-kick cannoned of Zach Hemming's upright, the goalkeeper denied Luis Palma on the follow-up, and the chance was gone.

From BBC ● Nov. 1, 2023

Fulham’s Issa Diop went down injured but the Blades refused to kick the ball out and Yasser Larouci’s dangerous cross cannoned off Robinson into his own net.

From Washington Times ● Oct. 7, 2023

And so he stumbled and nearly fell as she gasped and cannoned into Allun, standing still and almost invisible in the dimness.

From "Rowan of Rin" by Emily Rodda

However, Hanna Bennison soon reduced City's lead with a wonderful effort from distance, the ball cannoning off of the crossbar and into the net.

From BBC ● Mar. 2, 2024

Croatia should have scored more, with Perisic's shot from a tight angle cannoning back off the crossbar in what proved a vital moment.

From BBC ● Mar. 25, 2023

He cracked forehands from a sturdy crouch, his swing full and flowing, the ball cannoning down the sidewall to expire in the back corner, repetitious as a gif.

From The New Yorker ● Jan. 18, 2016

Cabaye, waiting on the edge of the area, thumped the ball back, his shot cannoning off the crossbar.

From The Guardian ● Jun. 30, 2014

The ladder fell sideways, cannoning into another one that had been set up beside it.

From "Redwall" by Brian Jacques

Related Words

• howitzer
• mortar
• ordnance