verb, adjective, noun, adverb · principal, primary, or most important

这顿饭以素食为主，口味非常清淡。

noun · God or a deity, especially within religious contexts

信徒们跪在神像前，虔诚地祈求主赐予他们力量。

noun · the person who owns, controls, or hosts something, such as a master or host

他是主，我是客，哪有让客人动手干活的道理？

noun · to indicate, mean, or be a sign of something

此占主凶，不宜出门。

verb · to have authority or control over someone or something; to dominate or determine.

在家里，所有重要的事情都是由我父亲做主。

noun · the suit or card that outranks others in card games

这把牌黑桃是主。