As used in this chapter—

(1) the term "children" means the plural and means individuals who have not attained the age of eighteen years;

(2) the term "ethnic group" means a set of individuals whose identity as such is distinctive in terms of common cultural traditions or heritage;

(3) the term "incites" means urges another to engage imminently in conduct in circumstances under which there is a substantial likelihood of imminently causing such conduct;

(4) the term "members" means the plural;

(5) the term "national group" means a set of individuals whose identity as such is distinctive in terms of nationality or national origins;

(6) the term "racial group" means a set of individuals whose identity as such is distinctive in terms of physical characteristics or biological descent;

(7) the term "religious group" means a set of individuals whose identity as such is distinctive in terms of common religious creed, beliefs, doctrines, practices, or rituals; and

(8) the term "substantial part" means a part of a group of such numerical significance that the destruction or loss of that part would cause the destruction of the group as a viable entity within the nation of which such group is a part.