born-again

adjective

1. committed or recommitted to religious faith through an intensely religious experience: a born-again Christian.
2. reactivated or revitalized: a born-again conservatism in American politics.
3. enthusiastically committed: a born-again jogger.

noun

4. a person who is characterized by a newfound faith or enthusiasm.

adjective

1. having experienced conversion, esp to evangelical Christianity
2. showing the enthusiasm of one newly converted to any causea born-again monetarist

noun

3. a person who shows fervent enthusiasm for a new-found cause, belief, etc

adj.

of Protestant Christians, by 1920, based on John iii:3. Used in figurative (non-religious) sense by 1977.