Meaning of PRINCIPAL in English

PRINCIPAL

/ ˈprɪnsəpl; NAmE / adjective , noun

■ adjective

[ only before noun ] most important; main :

The principal reason for this omission is lack of time.

New roads will link the principal cities of the area.

➡ note at main

■ noun

1.

( BrE ) the person who is in charge of a college or a university :

Peter Brown, principal of St John's college

—see also dean

2.

( NAmE ) = head teacher :

Principal Ray Smith

3.

[ usually sing. ] ( finance ) an amount of money that you lend to sb or invest to earn interest

4.

the person who has the most important part in a play, an opera , etc.

5.

( technical ) a person that you are representing, especially in business or law

••

WORD ORIGIN

Middle English : via Old French from Latin principalis first, original, from princeps , princip- first, chief.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.