1.Definition: (criminal law) any person involved in a criminal offense, regardless of whether the person profits from such involvement

Category: People

2.Definition: an actor who plays a principal role

Related Noun(s):lead, star

Category: People

3.Definition: capital as contrasted with the income derived from it

Related Noun(s):corpus

Category: General

4.Definition: the educator who has executive authority for a school

"She sent unruly pupils to see the principal"

Related Noun(s):head, head teacher, school principal

Category: People

5.Definition: the major party to a financial transaction at a stock exchange; buys and sells for his own account

Related Noun(s):dealer

Category: People

6.Definition: the original amount of a debt on which interest is calculated

Category: General