beam

American  

[beem] / bim /

noun

• beams
  plural

1. any of various relatively long pieces of metal, wood, stone, etc., manufactured or shaped especially for use as rigid members or parts of structures or machines.

2. Building Trades. a horizontal bearing member, as a joist or lintel.

3. Engineering. a rigid member or structure supported at each end, subject to bending stresses from a direction perpendicular to its length.

4. Nautical.

   1. a horizontal structural member, usually transverse, for supporting the decks and flats of a vessel.

   2. the extreme width of a vessel.

   3. the shank of an anchor.

5. Aeronautics. the direction perpendicular to the plane of symmetry of an aircraft and outward from the side.

6. the widest part.

7. Slang. the measure across both hips or buttocks.

   broad in the beam.

8. Machinery.

   1. walking beam.

   2. (in a loom) a roller or cylinder on which the warp is wound before weaving.

   3. a similar cylinder on which cloth is wound as it is woven.

9. the crossbar of a balance, from the ends of which the scales or pans are suspended.

10. a ray of light.

    The sun shed its beams upon the vineyard.

11. a group of nearly parallel rays.

12. Radio, Aeronautics. a signal transmitted along a narrow course, used to guide pilots through darkness, bad weather, etc.

13. Electronics. a narrow stream of electrons, as that emitted from the electron gun of a cathode ray tube.

14. the angle at which a microphone or loudspeaker functions best.

15. the cone-shaped range of effective use of a microphone or loudspeaker.

16. Citizens Band Radio Slang. beam antenna.

17. a gleam; suggestion.

    a beam of hope.

18. a radiant smile.

19. the principal stem of the antler of a deer.

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verb (used with object)

• beams,
  present (3rd person singular)
• beamed,
  past participle,  past
• beaming
  present participle

1. to emit in or as in beams or rays.

2. Radio. to transmit (a signal) in a particular direction.

3. Radio and Television. to direct (a program, commercial message, etc.) to a predetermined audience.

verb (used without object)

• beams,
  present (3rd person singular)
• beamed,
  past participle,  past
• beaming
  present participle

1. to emit beams, as of light.

2. to smile radiantly or happily.

idioms

1. fly the beam, (of an aircraft) to be guided by a beam.

2. off the beam,

   1. not on the course indicated by a radio beam.

   2. Informal. wrong; incorrect.

      The pollsters were off the beam again for the last presidential election.

3. beam in, to be received under optimum conditions; be heard loud and clear.

   They told me I was really beaming in.

4. on the beam,

   1. on the course indicated by a radio beam, as an airplane.

   2. Nautical. at right angles to the keel.

   3. Informal. proceeding well; correct; exact.

      Their research is right on the beam and the results should be very valuable.

beam British  

/ biːm /

noun

1. a long thick straight-sided piece of wood, metal, concrete, etc, esp one used as a horizontal structural member

2. any rigid member or structure that is loaded transversely

3. the breadth of a ship or boat taken at its widest part, usually amidships

4. a ray or column of light, as from a beacon

5. a broad smile

6. one of the two cylindrical rollers on a loom, one of which holds the warp threads before weaving, the other the finished work

7. the main stem of a deer's antler from which the smaller branches grow

8. the central shaft of a plough to which all the main parts are attached

9. a narrow unidirectional flow of electromagnetic radiation or particles

   a beam of light

   an electron beam

10. the horizontal centrally pivoted bar in a balance

11. informal the width of the hips (esp in the phrase broad in the beam )

12. a fault or grave error greater in oneself than in another person

13. 1. not following a radio beam to maintain a course

    2. informal wrong, mistaken, or irrelevant

14. 1. following a radio beam to maintain a course

    2. nautical opposite the beam of a vessel; abeam

    3. informal correct, relevant, or appropriate

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verb

1. to send out or radiate (rays of light)

2. (tr) to divert or aim (a radio signal or broadcast, light, etc) in a certain direction

   to beam a programme to Tokyo

3. to pass (data, esp business card details, etc) from one hand-held computer to another by means of infrared beams

4. (intr) to smile broadly with pleasure or satisfaction

beam More Idioms  

1. see broad in the beam; off the beam.

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Synonym Usage

See gleam. See shine ¹.

Other Word Forms

Derived Forms

• underbeam
  noun
• outbeam
  verb (used with object)
• beamed
  adjective
• beaming
  adjective
• beamless
  adjective
• beamlike
  adjective
• beamy
  adjective
• unbeamed
  adjective

Inflected Forms

Nouns

• beams
  plural

Participles

• beaming
  present
• beamed
  past

Conjugated Forms

Present

• beam
  simple
• beams
  simple
• have beamed
  perfect
• has beamed
  perfect
• am beaming
  progressive
• are beaming
  progressive
• is beaming
  progressive
• have been beaming
  perfect progressive
• has been beaming
  perfect progressive

Past

• beamed
  simple
• had beamed
  perfect
• was beaming
  progressive
• were beaming
  progressive
• had been beaming
  perfect progressive

Future

• will beam
  simple
• will have beamed
  perfect
• will be beaming
  progressive
• will have been beaming
  perfect progressive

Etymology

Origin of beam

First recorded before 900; Middle English beem, Old English bēam “tree, post, ray of light”; cognate with Old Frisian bām, Old Saxon bōm, Dutch boom, Old High German boum ( German Baum ), Gothic bagms, Old Norse bathmr tree; the identity of the consonant which has assimilated itself to the following m is unclear, as is the original root; perhaps unattested Germanic bagmaz, from unattested bargmaz, from unattested Indo-European bhorǵh-mos “growth”; see barrow ²

Explanation

A beam is a long board that's used to hold up a roof or doorway. The beams in your kitchen ceiling help support the upstairs floor just above it. In construction, beams are made of wood or metal and are used to frame a building and provide structure. In gymnastics, a beam is used for balancing and doing tricks on. If someone comments that you're getting "broad in the beam," they're disparaging the width of your body, especially your hips. In Old English, a beam first meant a tree, and later a rafter or a ship's timber.

Example Sentences

See Examples For:

beam beams beamed beaming

That changes when the researchers illuminate many regions at once with a broad laser beam.

From Science Daily ● Sep. 24, 2026

I do not need a service worker to beam.

From Salon ● Sep. 23, 2026

A second, weaker beam, called the probe, then passed through that material.

From Science Daily ● Sep. 18, 2026

Instead, the researchers used a powerful beam of light, known as the pump, with a carefully designed pattern that temporarily altered the optical behavior of a material.

From Science Daily ● Sep. 18, 2026

A blast of violet light shot through the end of the stick, but the Sleeper, now fully emerged from the wall, merely batted the beam of light aside.

From "Aru Shah and the End of Time" by Roshani Chokshi

Many other states and countries have been making use of the images Carbon Mapper’s first satellite, Tanager-1, beams down.

From Los Angeles Times ● Oct. 1, 2026

They can get into light beams and factory equipment, and buffing bird droppings out of freshly-painted vehicles is no easy task.

From The Wall Street Journal ● Sep. 27, 2026

Carefully controlled laser beams were then used to adjust how the ions interacted with one another.

From Science Daily ● Sep. 26, 2026

In the evening, two beams of light will project skyward from lower Manhattan, symbolic of the towers.

From Barron's ● Sep. 7, 2026

Crusher pointed his headlights up toward the sounds and his light beams faded into darkness.

From "The Wild Robot Protects" by Peter Brown

On Sunday, the North Korean leader beamed with pride after he commissioned the warship into North Korea’s navy.

From The Wall Street Journal ● Sep. 7, 2026

In 2014, she snapped up two penthouses in the chic Tribeca neighborhood for about $20 million and combined them into a nine-bedroom, nine-bath abode with beamed ceilings, a curved staircase, and enormous windows.

From MarketWatch ● Sep. 7, 2026

"My customers love it and then some of them, for example, they come in Spode, they can't move, in front of the entrance, like 'oh my god i'm in Stoke, i'm in Spode'," she beamed.

From BBC ● Jul. 27, 2026

The man behind me beamed as he watched me take items out of my basket.

From Los Angeles Times ● Jul. 24, 2026

The family gave a collective sigh of relief, and Hyacinth beamed with pleasure.

From "The Vanderbeekers of 141st Street" by Karina Yan Glaser

“They were both beaming the entire night,” an unnamed guest told the outlet.

From MarketWatch ● Sep. 7, 2026

The second, three minutes later, was stamped right through with class, bringing a beaming smile to the face of Iraola.

From BBC ● Sep. 4, 2026

A beaming Vickye Giraldo holds her rescued kitten tight against her chest outside her ruined home in quake-hit Cali, Colombia.

From Barron's ● Aug. 13, 2026

The company is envisioning a world in which artificial-intelligence models are largely served from space, with lasers and other satellite-communication technologies beaming data around, resulting in near-instant responses to queries.

From The Wall Street Journal ● Aug. 5, 2026

Wiping it against her shirt, she held it out to the hotteok lady with a beaming smile.

From "Finding Junie Kim" by Ellen Oh

Related Words

• girder
• joist
• piling
• pillar
• plank
• pole
• shaft
• sill
• timber