"principals" in the noun sense
1. principal
the original amount of a debt on which interest is calculated
2. principal, school principal, head teacher, head
the educator who has executive authority for a school
"she sent unruly pupils to see the principal"
3. star, principal, lead
an actor who plays a principal role
4. principal, corpus, principal sum
capital as contrasted with the income derived from it
5. principal
criminal law) any person involved in a criminal offense, regardless of whether the person profits from such involvement
6. principal, dealer
the major party to a financial transaction at a stock exchange buys and sells for his own account
Source: WordNet® (An amazing lexical database of English)
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