What does adulterer mean?
The definition of adulterer
A*dul”ter*er, n.
Etym: [Formed fr. the verb adulter, with the E. ending -er. See Advoutrer.]

1 A man who commits adultery; a married man who has sexual intercourse with a woman not his wife.
2 (Script.)
A man who violates his religious covenant. Jer. ix. 2.