What does antinomian mean?
The definition of antinomian
An`ti*no”mi*an, a.
Etym: [See Antimony.]

Of or pertaining to the Antinomians; opposed to the doctrine that the moral law is obligatory.

An`ti*no”mi*an, n. (Eccl. Hist.)
One who maintains that, under the gospel dispensation, the moral law is of no use or obligation, but that faith alone is necessary to salvation. The sect of Antinomians originated with John Agricola, in Germany, about the year 1535. Mosheim.