The person with the highest authority or most important position in an organization, institution, or group, especially in a school. The principal announced the new school policies during the assembly.
A sum of money lent or invested, on which interest is paid. She paid off the principal of her loan over five years.
A person for whom another acts as an agent or representative. The lawyer met with her principal to discuss the terms of the contract.
The leading performer in a concert, play, ballet, or opera. The principal dancer received a standing ovation for his performance.
In law, a person who directly commits or is primarily responsible for a crime. The jury found the principal guilty of armed burglary.