booms

IPA/buːm/
KK[bˈumz]IPA/buːm/

booms — noun

  • boomssingular
  • boomsesplural

1. a deep, loud, hollow sound that lasts for a few moments, such as the noise made

1.名詞B1
釋義

a deep, loud, hollow sound that lasts for a few moments, such as the noise made by an explosion, a cannon, or thunder rolling across the sky.

例句

The boom of the fireworks echoed through the hills around the village.

the boom of [something] — sound source after 'of'

Yumi covered her ears when the cannon let out a deep boom during the ceremony.

同義詞
  • blast

    sharper and more forceful than boom, often with a shockwave

  • rumble

    lower in pitch and longer-lasting, like distant thunder

  • roar

    louder and more continuous, like a crowd or an engine

文法句型

a boom

the boom of [something]

用法筆記

Used for single, sudden loud noises that feel deep and resonant. For a series of repeated sounds, 'booms' (plural) or 'boom-boom' is used informally.

常見錯誤

❌We heard an explosion boom.
✅We heard a loud boom from the explosion.
💡The boom is the sound itself, not a modifier for another noun.
❌The boom was exploded.
✅There was a deep boom when the building came down.
💡Boom describes the sound, not the destructive event.

2. a period during which a country's or region's economy grows very fast, creating

2.名詞B2
釋義

a period during which a country's or region's economy grows very fast, creating many jobs and increasing the amount of money people earn and spend.

例句

During the tech boom of the 1990s, many new software companies opened their doors.

tech boom / property boom — [sector] boom

After the war, the country experienced an economic boom that lasted nearly a decade.

同義詞
  • expansion

    more gradual than a boom; describes steady growth rather than a sudden surge

  • prosperity

    focuses on wealth and success rather than the speed of growth itself

反義詞
  • bust

    the sudden drop that follows an economic boom

  • recession

    a period of negative economic growth

文法句型

[adjective] boom

boom in [industry/sector]

用法筆記

Often paired with a specific industry sector (tech boom, property boom, oil boom). The opposite is 'bust' — 'boom and bust' describes the cycle of rapid growth followed by sharp decline.

常見錯誤

❌The economy had a boom of 5%.
✅The economy grew by 5% during the boom.
💡'Boom' is a period, not a growth percentage.
❌I got a boom in my salary.
✅I got a big raise in my salary.
💡'Boom' for economic or industry-wide growth, not personal finances.

3. a sudden large rise in the level, popularity, or amount of something, such as a

3.名詞B2
釋義

a sudden large rise in the level, popularity, or amount of something, such as a population, a trend, or an area of interest.

例句

There has been a boom in cycling since the city built new bike lanes.

boom in [activity/subject] — followed by 'in'

The baby boom after the war created a huge need for new schools and housing.

baby boom — fixed collocation for population increase

同義詞
  • surge

    a sudden strong forward movement, often used for emotions or numbers

  • spike

    a very sharp, short-term increase that quickly levels off

反義詞
  • decline

    a gradual reduction

  • drop

    a sudden fall in numbers or popularity

文法句型

boom in [something]

boom of [something]

用法筆記

Distinguish from the ECONOMIC GROWTH sense (noun/2): this sense is broader and can apply to population, trends, tourism, or any non-financial surge. Followed by 'in' to specify what is increasing.

4. a long horizontal pole attached to the mast of a sailing boat that holds the bot

4.名詞B2
釋義

a long horizontal pole attached to the mast of a sailing boat that holds the bottom edge of a sail in place.

例句

Asher pulled the rope to swing the boom across the deck and catch the wind.

Keep your head low when the boom swings — it can knock someone overboard.

safety warning — the boom swings suddenly

同義詞
  • spar

    a general term for any pole on a boat; a boom is a specific type of spar

文法句型

the boom

a boom

用法筆記

Boom here is a specific sailing term. The vertical pole is called the 'mast'. Beginners should learn the word in context of sailing or boat maintenance.

常見錯誤

❌The boat's boom is at the top.
✅The boom runs along the bottom edge of the sail.
💡The boom is the horizontal pole near the deck, not at the mast-top.

5. a piece of filmmaking gear made of an extendable rod with a sound-recording devi

5.名詞B2
釋義

a piece of filmmaking gear made of an extendable rod with a sound-recording device attached at the tip, held overhead to capture actors' dialogue while staying out of the camera frame.

例句

The sound technician held the boom steady above the actors' heads during the entire scene.

Putri lowered the boom so the microphone would not cast a shadow on the set.

同義詞
  • boom mic

    the same equipment, used as a compound noun in everyday film-industry language

文法句型

a boom

boom mic

用法筆記

Often shortened to 'boom mic' or simply 'boom'. The person operating it is called a 'boom operator'. Common on film sets, TV studios, and documentary productions.

常見錯誤

❌He held the boom on his shoulder.
✅He held the boom over the actors, above the camera frame.
💡The boom is held overhead, not on the shoulder like a camera.

booms — verb