definition of nullity:
a court decree that nullifies (invalidates) a marriage. In the eyes of the law, an annulment is a complete reset, as if the marriage had never occurred. To issue an annulement, courts generally require that there was some legal impediment to the marriage at the time it was performed.
nullity, as it might be used:
In determining the nature and character of fraud warranting nullity of marriage, age and mental condition of person injured are material factors.
nullity may also be referred to as: