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Word

principle

noun B2
/ˈpɹɪn.sɪ.pəl/

Meanings

noun

A basic rule or belief that guides behavior and decisions.

principle: A basic rule or belief that guides behavior and decisions.
noun

An important general truth or rule that explains how something works.

principle: An important general truth or rule that explains how something works.

Definition

A principle is a basic rule or belief that guides how someone thinks or acts.

A principle is a fundamental rule, standard, or belief that helps people decide what is right, fair, or sensible. People often follow principles when making choices, even when it is difficult. The word can also refer to an important general truth that explains how something works.

Examples

  • Honesty is a principle she refuses to compromise.
  • The company’s principle is to put safety first.
  • They disagreed on principle, not because of the money.
  • He explained the principle behind how the engine works.

Common mistake

Learners often confuse principle (a rule or belief) with principal (a head teacher or something most important).