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

Pronunciation change

Adjective change

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 change

Antonyms change

Related words change

Noun change

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.