principal
//ˈprɪnsɪpəl//
Noun
principalSingular
principalsPlural
1
The head of a school or educational institution.
The principal announced a new policy at the morning assembly.
2
A person who has the highest authority or is in charge of an organization.
The principal of the company announced the new policy.
3
The original sum of money invested or lent, on which interest is calculated.
The interest is calculated based on the principal.
4
A person for whom another acts as an agent or representative.
The agent must always act in the best interest of the principal.
Synonym
Adjective
principalCanonical form
1
First in order of importance; main or primary.
The principal reason for the delay was bad weather.