v., boomed, boom·ing, booms.

v.intr.

1. To make a deep, resonant sound.
2. To grow, develop, or progress rapidly; flourish: Business is booming.

v.tr.

1. To utter or give forth with a deep, resonant sound: a field commander booming out orders.
2. To cause to grow or flourish; boost.

n.

1. A deep resonant sound, as of an explosion.
2. A time of economic prosperity.
3. A sudden increase, as in popularity.

[Middle English bomben, imitative of a loud noise.]

boom² (būm)
n.

1. Nautical. A long spar extending from a mast to hold or extend the foot of a sail.
2. A long pole extending upward at an angle from the mast of a derrick to support or guide objects being lifted or suspended.
3. 1. A barrier composed of a chain of floating logs enclosing other free-floating logs, typically used to catch floating debris or to obstruct passage.
   2. A floating barrier serving to contain an oil spill.
4. A long movable arm used to maneuver and support a microphone.
5. 1. A spar that connects the tail surfaces and the main structure of an airplane.
   2. A long hollow tube attached to a tanker aircraft, through which fuel flows to another aircraft being refueled in flight.

tr.v., boomed, boom·ing, booms.

To move or position using a crane: “The renegade logs somehow escaped while . . . the logs were boomed up into the mile-long rafts that ply these channels” (Jack Weatherford).

idiom:

drop (or lower) the boom

1. To act suddenly and forcefully to repress a practice or reprimand an offender; crack down.

[Dutch, tree, pole, from Middle Dutch.]

A period of time during which sales or business activity increases rapidly.

Investopedia Says:
In the stock market, booms are associated with bull markets. Conversely, busts are associated with bear markets. The cyclical nature of the market and the economy in general suggests that every bull market in history has been followed by a bear market.

The internet technologies boom in the late '90s was one of the largest booms in history (followed by one of the biggest busts in history).

Related Links:
You need to understand the various phases of the market cycle to avoid bubbles and also maximize your returns. Understanding Cycles - The Key To Market Timing
This strategy can be profitable but requires careful timing and analysis of various factors. Find out what they are. The Ups And Downs Of Investing In Cyclical Stocks
Understanding the business cycle and your own investment style can help you cope with an economic decline. Recession: What Does It Mean To Investors?
From a tulip craze to a dotcom bubble, read the cautionary tales of the stock market's greatest disasters. The Greatest Market Crashes
Uncover the next "hot spot" for development - before the boom hits. Profit With Real Estate Land Speculation

In general: marked increase or upsurge, as an economic boom or a baby boom.

Television production:

1. Movable, adjustable mechanical arm that acts as a support for

the performers' microphone when telecasting. The boom keeps the microphone just above and in front of the speaking performer and out of sight of the camera. In this way, the volume is maintained at an even level and extraneous noise is shut out. The boom is telescopic and rests on a vertical stand. It can move forward, backward, or sideways. It can also be moved up or down, by means of a crank on the stand, and thus can cover the entire stage area as required by the action on the set.

2. Raise or lower the mechanical arm (boom) as in "boom up" or "boom down."

3. Raise or lower a camera that has been mounted on a camera crane, as in "boom up" or "boom down."

Theater production: stationary vertical pipe used for mounting spotlights on a stage.

verb

1. To make a continuous deep reverberating sound: growl, grumble, roll, rumble. See sounds/pleasant sounds/unpleasant sounds/neutral sounds or silence.
2. To make an earsplitting explosive noise: bang, blast, roar, thunder. See sounds/pleasant sounds/unpleasant sounds/neutral sounds or silence.
3. To do or fare well: flourish, go, prosper, thrive. Slang score. Idioms: getgosomewhere, go great guns, go strong. See thrive/fail/exist.

noun

An earsplitting, explosive noise: bang, blast, roar, thunder. See sounds/pleasant sounds/unpleasant sounds/neutral sounds or silence.

n

Definition: prosperity
Antonyms: collapse, failure, loss

v

Definition: prosper
Antonyms: collapse, fail, falter, lose

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Origin: 1871

Boom and bust has been the roller-coaster pattern of the American economy. Or at least boom and bust have been used as snappy labels for the great expansions and contractions of business activity as the country has grown. The terms have also been used for small expansions and contractions, for a new town booming with construction or a player going bust in a card game. Bust (1764) actually came long before boom, the first appearance of boom in the business sense apparently due to Mark Twain: "My popularity is booming, now," he wrote to his publisher in 1871.

But boom quickly made up for its late start toward the end of the nineteenth century and the start of the twentieth. This was the great era of boom towns (1900) and boom cities (1904), of real-estate booms (1887), cotton booms (1880), immigration booms (1890), oil booms (1907), even presidential booms (1887). Encouraging all this activity were boomers (1880), people who spread enthusiasm for a project, an investment, a town, or a candidate. Those who did this for a living were the forerunners of those we now call by the more polite names of promoters or public relations people.

The later twentieth century had a boom of its own, a baby boom (1941). The boom in births in the United States began after the end of World War II and continued until the early 1960s. Some references to the baby boom were made during those years, but it was only in 1974, well after the baby boom was over, that those born during the boom were first labeled baby boomers. Because of their numbers, the supposedly self- indulgent boomers stayed in the public eye as they aged, acquiring new fads and tastes and contrasting with the members of the leaner, supposedly less-privileged Generation X (1990) that followed.

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n. 1. a pivoted spar to which the foot of a vessel's sail is attached, allowing the angle of the sail to be changed.

2. a floating beam used to contain oil spills or to form a barrier across the mouth of a harbor or river.

See the Introduction, Abbreviations and Pronunciation for further details.

1. A cantilevered or projecting structural member (such as a beam or spar) which is used to support, hoist, or move a load.
2. The projecting member at the front of a crane or derrick which is used for this purpose.

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This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)

Dansk (Danish)
1.
n. - boom, opsving, højkonjunktur
v. intr. - drøne, buldre, runge
v. tr. - tage et opsving, stige voldsomt

idioms:

• boom box    ghettoblaster
• boom town    by i rivende udvikling

2.
n. - mikrofonstativ, giraf, boomstang

Nederlands (Dutch)
dreun, boem, knal, hausse, hoogconjunctuur, opleving, daveren, dreunen, (op)bloeien, luidruchtig uiten

Français (French)
1.
n. - (Comm, Fin) boom, période d'essor, vague de prospérité, grondement, retentissement, mugissement
v. intr. - retentir, résonner, gronder, se développer, être en plein essor
v. tr. - faire retentir, monter en flèche (une économie), faire croître

idioms:

• boom box    radiocassette portatif
• boom town    ville champignon, ville prospère

2.
n. - (Naut) bout-dehors (de foc), barrage flottant, (Cin, TV) perche (de microphone)

Deutsch (German)
1.
n. - Dröhnen, Aufschwung, Boom, Hochkonjunktur
v. - donnern, dröhnen, sich sprunghaft entwickeln, rapide steigen

idioms:

• boom box    (Slang) (lauter) Radiorekorder
• boom town    Stadt in sprunghaftem Aufschwung

2.
n. - Ausleger

Ελληνική (Greek)
v. - βγάζω βαθύ και δυνατό ήχο, βοώ, σημειώνω ραγδαία άνοδο, ανάπτυξη ή άνθηση, ευημερώ, ακμάζω
n. - οικονομική άνθηση, χρυσές δουλειές, βουή, ορυμαγδός, βροντή, κρότος, βραχίονας γερανού, (ναυτ.) δοράτιο, μπούμα (της ράντας), λιμενόφραγμα, στέλεχος μικροφώνου

idioms:

• boom box    μεγάλο φορητό ραδιοκασετόφωνο
• boom town    πόλη σε φάση ταχείας ανάπτυξης

Italiano (Italian)
rimbombare, schianto, ripresa

idioms:

• boom box    radio portatile
• boom town    città in forte sviluppo

Português (Portuguese)
v. - ribombar, expandir-se
n. - estrondo (m), expansão (f)

idioms:

• baby boom    explosão (f) de natalidade
• boom box    grande toca-fitas (m) portátil
• boom town    cidade (f) com rápido desenvolvimento econômico e social

Русский (Russian)
громкий звук, бум, взрыв

idioms:

• baby boom    взрыв деторождаемости
• boom box    переносной магнитофон с колонками
• boom town    быстро растущий город

Español (Spanish)
1.
n. - estampido, bramido, prosperidad, auge
v. intr. - retumbar, tronar, resonar
v. tr. - crecer rápidamente

idioms:

• boom box    casete
• boom town    ciudad de crecimiento rápido

2.
n. - varilla, pértiga de soporte

Svenska (Swedish)
v. - dona, dundra, göra reklam
n. - bom, dunder, brus, uppsving, högkonjunktur, reklam

中文（简体） (Chinese (Simplified))
1. 发出隆隆声, 激增, 暴涨, 声音隆隆而过, 迅速发展, 兴旺, 用隆隆声表达, 使兴旺, 使迅速发展, 使出名, 隆隆声, 嗡嗡声, 澎湃声, 景气, 繁荣

idioms:

• boom box    发很大声的声响匣子
• boom town    新兴都市

2. 吊杆, 栅栏, 横江铁索, 栏木或横江铁索, 帆的下桁, 帆杠, 臂

中文（繁體） (Chinese (Traditional))
1.
n. - 吊桿, 柵欄, 橫江鐵索, 欄木或橫江鐵索, 帆的下桁, 帆杠, 臂

2.
v. intr. - 發出隆隆聲, 激增, 暴漲, 聲音隆隆而過, 迅速發展, 興旺
v. tr. - 用隆隆聲表達, 使興旺, 使迅速發展, 使出名
n. - 隆隆聲, 嗡嗡聲, 澎湃聲, 景氣, 繁榮

idioms:

• boom box    發很大聲的聲響匣子
• boom town    新興都市

한국어 (Korean)
1.
n. - 쾅 하는 소리, 폭등, 드럼
v. intr. - 꽝 울리다, 윙윙거리다
v. tr. - 갑작스레 번창하다

2.
n. - 긴 막대의 형태

日本語 (Japanese)
n. - とどろき, うなり, にわか景気, ブーム, 急騰, 帆げた, 腕, 防材
v. - 轟く, ブーンという, にわかに景気づく, 急騰する

idioms:

• boom box    大型の簡易カセットプレイヤー
• boom town    急に発展した町

العربيه (Arabic)
‏(فعل) ازدهر, انتعش, راج, دوى, هدر (الاسم) انتعاش اقتصادي, دوي, عارضه الشراع, حاجز‏

עברית (Hebrew)
v. intr. - ‮הידהד, שיגשג, הצליח, התפרסם‬
v. tr. - ‮הרעיש, הידהד, הצליח, התפרסם‬
n. - ‮רעם, רעש, שאון, הד עמוק, בום, שגשוג מהיר‬
n. - ‮זרוע המיקרופון, מנור (בספינה), שרשרת-קורות בנהר, מחיצה צפה בפתח נמל או נהר, כלונס לשינוי זווית המפרש‬

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boom box	sonic boom
boom boxes	boom chair