Englishfor English speakers
main
Adjective
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The main thing is the most important or biggest one.
They turned off the main road and saw a small house.
There are many problems, but the main one is money.
what was the main reason for war in Europe in 1914?
main
Noun
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A main is a large pipe or wire that carries gas, water, electricity, etc.
A break in a water main has closed the road.
boom
Noun
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A boom is the sound that is made from an explosion.
The boom of that volcano hurt my ears.
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A boom can also be any movable pole; in sailing, it is a pole that comes from the bottom of a sail.
boom
Verb
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To boom is to make a loud sound.