noun
saviour; messiah
General term for a person who saves others from difficulty or danger; can be used figuratively.
彼はチームの救世主と呼ばれている。
He is called the saviour of the team.
noun
Specifically refers to the Messiah in Christianity; often capitalized in English.
キリスト教では、イエスが救世主とされている。
In Christianity, Jesus is considered the Messiah.