boom¹ /boom/

To make a hollow sound or roar

A hollow roar

boomˈy adjective

boomˈbox noun (slang)

A powerful portable radio and cassette recorder with built-in speakers, a ghetto-blaster

boom² /boom/

1. To become active or busy suddenly
2. To become suddenly prosperous
3. To increase sharply in value

1. To push into sudden prominence
2. To boost by advertising

1. A sudden increase of activity in business, etc, a period of expansion of the economy
2. A sudden rise in price or value

boomˈer noun

A baby boomer (qv under baby)

boomˈing noun and adjective

boomˈlet noun

A minor economic boom

boom town noun

One which has expanded rapidly and prospered because of eg the arrival of a valuable new industry

boom and bust

Alternate periods of economic expansion and recession

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