antinomian

noun

an·​ti·​no·​mi·​an ˌan-ti-ˈnō-mē-ən 

1

: one who holds that under the gospel dispensation of grace (see grace entry 1 sense 1a) the moral law is of no use or obligation because faith alone is necessary to salvation

2

: one who rejects a socially established morality

antinomian adjective

antinomianism

ˌan-ti-ˈnō-mē-ə-ˌni-zəm 

noun

Word History

Etymology

New Latin antinomus "person holding antinomian beliefs" (from anti- anti- + -nomus, borrowed from Greek nómos "custom, convention, law") + -ian — more at nomothetic

First Known Use

1548, in the meaning defined at sense 1