main is one of the 1000 most common headwords.
machine - main - major

Pronunciation

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Adjective

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Positive
main

Comparative
none

Superlative
none

Main is on the Academic Vocabulary List.
  1. (usually before a noun) 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?

Synonyms

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Antonyms

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Singular
main

Plural
mains

  1. (countable) A main is a large pipe or wire that carries gas, water, electricity, etc.
    A break in a water main has closed the road.