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principal

B2
UK/ˈprɪnsəpəl/US/ˈprɪnsəpəl/

Formal to neutral

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Definition

Meaning

most important; main; first in rank or importance

1. The head of a school or college. 2. A sum of money lent or invested, on which interest is paid. 3. A leading performer in a play, concert, etc. 4. A person for whom another acts as an agent or representative.

Linguistics

Semantic Notes

Principal (adjective) means 'main' or 'most important'. Principal (noun) has several distinct meanings: head of school, original sum of money, leading performer, or person represented by an agent. The word is often confused with 'principle' (a fundamental truth or rule).

Dialectal Variation

British vs American Usage

Differences

No significant differences in meaning. Both use 'principal' for school heads and financial contexts. Spelling identical.

Connotations

In both varieties, 'principal' carries formal/authoritative connotations when referring to a school head. In finance, it's technical/formal.

Frequency

Equally common in both varieties. Slightly more formal register in British English for the 'school head' sense.

Vocabulary

Collocations

strong
principal reasonprincipal amountschool principalprincipal investigatorprincipal component
medium
principal concernprincipal sourceprincipal roleprincipal officeprincipal sum
weak
principal aimprincipal streetprincipal actorprincipal teacherprincipal city

Grammar

Valency Patterns

principal + noun (e.g., principal reason)the + principal + of + institutionprincipal + in + performance/transaction

Vocabulary

Synonyms

Strong

paramountpredominantpreeminentsupremecardinal

Neutral

mainprimarychiefkeyforemost

Weak

majorcentralleadingprimehead

Vocabulary

Antonyms

secondaryminorsubordinateauxiliaryinsignificant

Phrases

Idioms & Phrases

  • “The principal of the thing (emphasis on main point)”
  • “Principal and interest (financial)”

Usage

Context Usage

Business

Refers to the original sum of money in a loan or investment, excluding interest.

Academic

Used in research titles (Principal Investigator) and as head of educational institutions.

Everyday

Most commonly refers to the head teacher of a school.

Technical

In finance: the capital sum. In law: the person who authorizes an agent. In statistics: principal component analysis.

Examples

By Part of Speech

verb

British English

  • (No standard verb form)

American English

  • (No standard verb form)

adverb

British English

  • (No standard adverb form)

American English

  • (No standard adverb form)

adjective

British English

  • The principal reason for the delay was bad weather.
  • Her principal concern is the safety of the children.

American English

  • The principal cause of the accident was driver error.
  • Our principal objective is to increase sales.

Examples

By CEFR Level

A2
  • The principal of our school is very kind.
  • My principal reason for coming was to see you.
B1
  • The principal amount of the loan must be repaid within five years.
  • She played the principal role in the school play.
B2
  • The committee's principal recommendation was to increase funding for arts programmes.
  • As principal of the firm, he made all major decisions.
C1
  • The principal investigator secured a substantial grant for the research project.
  • In agency law, the principal is bound by the acts of the agent within their authority.

Learning

Memory Aids

Mnemonic

Your school PAL is the Principal (both end with 'pal'). The Principal is your main PAL at school.

Conceptual Metaphor

IMPORTANCE IS HEIGHT/TOP (principal = at the top, foremost)

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

  • Не путать с 'principle' (принцип).
  • В финансовом контексте: 'principal' = основная сумма долга, а не процент.
  • В значении 'директор школы' — обычно относится к школам, не к университетам (где 'rector' или 'dean').

Common Mistakes

  • Confusing 'principal' with 'principle'.
  • Misspelling as 'principle' when meaning 'main'.
  • Using 'principal' for university heads (usually 'dean' or 'president' in US, 'vice-chancellor' in UK).

Practice

Quiz

Fill in the gap
The reason for the policy change was financial pressure.
Multiple Choice

Which sentence uses 'principal' correctly?

FAQ

Frequently Asked Questions

'Principal' means main or most important (adjective) or a person in authority/sum of money (noun). 'Principle' means a fundamental truth, rule, or belief.

No, 'principal' is not used as a verb in standard English. The related verb is 'principle' (rare, meaning to impress with a principle).

No significant differences. Both use it for school heads and financial contexts. The word is spelled and pronounced the same.

Remember: The principal is your PAL at school. Or: Principal ends with 'pal' (a person), principle ends with 'ple' (a rule).

Explore

Related Words

dominantkeyleadingmainmajorparamountprimaryprime