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Word

principal

noun B2
/ˈpɹɪn.sɪ.pəl/

Meanings

noun

the head of a school

principal: the head of a school
noun

the most important person or thing in a situation or organization

principal: the most important person or thing in a situation or organization
adjective

most important; main

principal: most important; main

Definition

A principal is the head of a school or the main person or thing in a situation.

A principal is the person in charge of a school, especially an elementary or high school. The word can also mean the most important person or thing involved in an event, agreement, or organization. It often contrasts with supporting roles, secondary factors, or “interest” in finance.

Examples

  • The principal called a meeting with the teachers.
  • She is the principal investigator on the project.
  • Our principal concern is student safety.
  • He spoke to the principal after class.
  • They agreed on the principal terms of the contract.

Common mistake

Learners often confuse principal (main/leader) with principle (a rule or belief).