What does メイン mean?
メイン is a Japanese adjective meaning “main; principal” in English. It is written as メイン in hiragana, and mein in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
昨日の競馬のメインレースは、とってもかたくおさまったよ。ああいうのを、銀行レースって言うんだよね。
The main race yesterday was no surprise. That's the kind of race you can bank on.