That which is contrary to law; it is usually applied to bastards, or children born out of lawful wedlock.
The Louisiana Code divided illegitimate children into two classes: (1) Those born from two persons who, at the moment when such children were conceived, could have lawfully intermarried; and (2) those who are born from persons to whose marriage there existed at the time some legal Impediment Both classes, however, could be acknowledged and take by devise. Compton v. Prescott 12 Rob. (La.) 56.