a prolonged form of the feminine of 3432; TDNT - 4:729,605
AV - adulterous 3, adulteress 3, adultery 1; 7
1) an adulteress
2) as the intimate alliance of God with the people of Israel was likened to a marriage, those who relapse into idolatry are said to commit adultery or play the harlot
2a) fig. equiv. to faithless to God, unclean, apostate