principal

the original amount of a debt on which interest is calculated

the educator who has executive authority for a school; "she sent unruly pupils to see the principal"

an actor who plays a principal role

capital as contrasted with the income derived from it

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

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

most important element; "the chief aim of living"; "the main doors were of solid glass"; "the principal rivers of America"; "the principal example"; "policemen were primary targets"; "the master bedroom"; "a master switch"