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• steam
  steam

  noun

  water in the form of an invisible gas or vapor.
• STEAM
  STEAM

  noun

  science, technology, engineering, arts, and mathematics, considered as a group of academic or career fields (often used attributively).

steam

¹ American  

[steem] / stim /

noun

• steam
  plural

1. water in the form of an invisible gas or vapor.

2. water changed to this form by boiling, extensively used for the generation of mechanical power, for heating purposes, etc.

3. the mist formed when the gas or vapor from boiling water condenses in the air.

4. an exhalation of a vapor or mist.

5. Informal. power or energy.

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verb (used without object)

• steams,
  present (3rd person singular)
• steamed,
  past participle,  past
• steaming
  present participle

1. to emit or give off steam or vapor.

2. to rise or pass off in the form of steam or vapor.

3. to become covered with condensed steam, as a window or other surface (often followed byup ).

4. to generate or produce steam, as in a boiler.

5. to move or travel by the agency of steam.

6. to move rapidly or evenly.

   He steamed out of the room.

7. Informal. to be angry or show anger.

   Fans are still steaming from Monday night’s sloppy 5-4 loss.

verb (used with object)

• steams,
  present (3rd person singular)
• steamed,
  past participle,  past
• steaming
  present participle

1. to expose to or treat with steam, as in order to heat, cook, soften, renovate, or the like.

2. to emit or exhale (steam or vapor).

3. Informal. to cause to become irked or angry (often followed byup ).

4. to convey by the agency of steam.

   to steam the ship safely into port.

adjective

1. heated by or heating with steam.

   a steam radiator.

2. propelled by or propelling with a steam engine.

3. operated by steam.

4. conducting steam.

   a steam line.

5. bathed with or affected by steam.

6. of or relating to steam.

idioms

1. blow / let off steam, to give vent to one's repressed emotions, especially by talking or behaving in an unrestrained manner.

   Don't take her remarks too seriously—she was just blowing off steam.

STEAM ² American  

[steem] / stim /

noun

1. science, technology, engineering, arts, and mathematics, considered as a group of academic or career fields (often used attributively).

   Engaging students in STEAM subjects helps them become adept at solving all kinds of problems they might encounter, regardless of their chosen careers.

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steam British  

/ stiːm /

noun

1. the gas or vapour into which water is changed when boiled

2. the mist formed when such gas or vapour condenses in the atmosphere

3. any vaporous exhalation

4. informal power, energy, or speed

5. 1. (of a ship, etc) to work up a sufficient head of steam in a boiler to drive an engine

   2. informal to go quickly

6. informal to release pent-up energy or emotions

7. without the assistance of others

8. slang cheap wine

9. (modifier) driven, operated, heated, powered, etc, by steam

   a steam radiator

10. (modifier) treated by steam

    steam ironed

    steam cleaning

11. humorous (modifier) old-fashioned; outmoded

    steam radio

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verb

1. to emit or be emitted as steam

2. (intr) to generate steam, as a boiler, etc

3. (intr) to move or travel by steam power, as a ship, etc

4. informal (intr) to proceed quickly and sometimes forcefully

5. to cook or be cooked in steam

6. (tr) to treat with steam or apply steam to, as in cleaning, pressing clothes, etc

steam Scientific  

/ stēm /

1. Water in its gaseous state, especially at a temperature above the boiling point of water (above 100°C, or 212°F, at sea level).

2. See Note at vapor

3. A mist of condensed water vapor.

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steam More Idioms  

1. see blow off steam; full speed (steam) ahead; get up steam; run out of steam; under one's own steam.

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Other Word Forms

Derived Forms

• outsteam
  verb (used with object)
• presteam
  adjective
• steamless
  adjective
• unsteamed
  adjective
• unsteaming
  adjective

Inflected Forms

Nouns

• steam
  plural

Participles

• steaming
  present
• steamed
  past

Conjugated Forms

Present

• steam
  simple
• steams
  simple
• have steamed
  perfect
• has steamed
  perfect
• am steaming
  progressive
• are steaming
  progressive
• is steaming
  progressive
• have been steaming
  perfect progressive
• has been steaming
  perfect progressive

Past

• steamed
  simple
• had steamed
  perfect
• was steaming
  progressive
• were steaming
  progressive
• had been steaming
  perfect progressive

Future

• will steam
  simple
• will have steamed
  perfect
• will be steaming
  progressive
• will have been steaming
  perfect progressive

Etymology

Origin of steam

before 1000; Middle English steme, Old English stēam; cognate with Dutch stoom

Explanation

Steam is what water becomes when it's heated to boiling and begins to turn into a gas. On a cold morning, you can really see the steam rising off your mug of hot chocolate. The steam we can see is water vapor, made up of the tiny water drops that form while water condenses. People have put steam to work in many different ways, including cooking, cleaning, and even powering trains and boats. If you "let off steam," you express your frustration or anger to calm yourself down. If you "lose steam," you lose energy or enthusiasm.

Example Sentences

See Examples For:

steam STEAM steams steamed steaming

The Sussexes needed a “brand refresh,” says Ingrid Seward, editor in chief of Majesty Magazine, noting that the couple’s efforts to build a media empire in Hollywood have run out of steam.

From The Wall Street Journal ● Aug. 20, 2026

It seems the Treasury Department’s plan of lowering long-term bond yields might be running out of steam.

From MarketWatch ● Aug. 20, 2026

"Taken together, the data suggest that US economic momentum may be losing some steam, strengthening expectations that the Federal Reserve could leave rates unchanged in September."

From Barron's ● Aug. 17, 2026

Its major components, including reactor vessel heads, steam generator parts and low-pressure and high-pressure turbines, were all recently updated as part of the 2030 extension, said Maureen Zawalick, chief risk officer at PG&E.

From Los Angeles Times ● Aug. 16, 2026

Constructed out of a forty-foot-long cylindrical steam boiler, the Hunley was designed for an eight-man crew—seven to turn the hand-cranked propeller and a commander to control the steering and the depth.

From "Shipwrecked!" by Martin W. Sandler

Jakes, the televangelist and bestselling author, is aiming to help avert a looming employment crisis for minority communities by promoting a camp based on STEAM.

From Washington Times ● Feb. 3, 2022

While the activities are hands-on lessons in science, technology, engineering, art and math, or STEAM, Mr. Lee says the children are also learning about resilience: the willingness to overcome adversity and try, try again.

From New York Times ● Feb. 22, 2019

But personally I like to call it STEAM.

From Washington Times ● Apr. 7, 2016

This is the very problem being addressed by STEAM.

From Slate ● Jun. 16, 2015

Do NOT tell your plans to anyone, it throws away the energy needed to bring forth the plan, it wastes your STEAM.

From Manual of the Enumeration A Text Book on the Sciences of the Enumeration by C. J. Coffman

The emptied vessel then returns to Iran—or at least used to, before the blockade—while the newly laden one steams on to China.

From The Wall Street Journal ● May 28, 2026

Norris also maintained other income steams, including a long-running role as a pitchman for the Total Gym line of exercise equipment, promoting his fitness regimen well into his 80s.

From MarketWatch ● Mar. 20, 2026

I pile it over rice cooker rice, which steams quietly in the background like a saint and doesn’t punish me for wanting a warm carb in a too-hot world.

From Salon ● Jul. 8, 2025

And, as her era of brand builder, lifestyle influencer, and businesswoman steams on, what will it really take for her to broaden her popularity and win over those who are circumspect - or downright negative?

From BBC ● Apr. 6, 2025

The water steams, and as the steam clears, I can see the few remaining water bottles at the bottom of the ruptured cooler melt, spilling the contents out pointlessly.

From "Dry" by Neal Shusterman and Jarrod Shusterman

All the clothes you see, he steamed up.

From Los Angeles Times ● Aug. 21, 2026

Xu, whose mother died when he was a year old, recalled in a speech how he ate only sweet potato and steamed bread in his school years.

From Barron's ● Aug. 20, 2026

Bell was particularly metronomic as she conceded just 16 from her 11 wicketless overs, while Issy Wong steamed in with her usual energy and passion.

From BBC ● Jul. 11, 2026

A hulking tanker known as the Plata Carrier steamed out of the Strait of Hormuz last week carrying 2 million barrels of crude.

From The Wall Street Journal ● Jul. 2, 2026

We eat chicken with steamed rice and vegetables in a light, salty sauce.

From "The Wrong Way Home" by Kate O’Shaughnessy

At 02:05 she wrote again: "Kyle is steaming".

From BBC ● Jul. 8, 2026

I also avoid making a towering high volcano, instead sticking to small piles or hills, since I like to enjoy my mashed potatoes steaming hot.

From Salon ● Jun. 28, 2026

Those were days of profound anguish for distraught families back in Ecuador, who had no idea their loved ones were safe — and steaming toward Central America.

From Los Angeles Times ● Jun. 15, 2026

A steaming cup of coffee gradually cools, a laptop warms up during use, and sunlight heats the Earth's surface.

From Science Daily ● Jun. 8, 2026

He drank green and brown concoctions or just threw the herbs into a steaming pot and covered his head with a cloth to inhale them.

From "Flying Through Water" by Mamle Wolo