Concept vs Idea vs Notion vs Principle vs Theory

Quando usar cada um em inglês, com significado, registro e exemplos.

Concept

Top 1000 (muito comum) B2 noun

Idea

Top 1000 (muito comum) A1 noun

Notion

Top 2000 (comum) B2 noun

Principle

Top 1000 (muito comum) B2 noun

Theory

Top 1000 (muito comum) B1 noun

	Concept	Idea	Notion	Principle	Theory
Pronúncia	🇬🇧 /["/ˈkɒnsept/"]/ 🇺🇸 /["/ˈkɑːnsept/"]/	🇬🇧 /["/aɪˈdɪə/"]/ 🇺🇸 /["/aɪˈdiːə/"]/	🇬🇧 /["/ˈnəʊʃn/"]/ 🇺🇸 /["/ˈnəʊʃn/"]/	🇬🇧 /["/ˈprɪnsəpl/"]/ 🇺🇸 /["/ˈprɪnsəpl/"]/	🇬🇧 //ˈθɪəri// 🇺🇸 //ˈθɪəri//
Significado	Uma ideia ou um plano na sua cabeça. An idea or a plan in your mind.	Um pensamento ou sugestão sobre algo. A thought or suggestion about something.	An idea or belief about something.	Uma verdade ou regra básica que guia o comportamento A basic truth or rule that guides behavior	Uma ideia ou explicação que tenta explicar alguma coisa. An idea or explanation that tries to explain something.
Exemplo	The concept of freedom varies greatly from one culture to another.	She had a brilliant idea for a new invention.	The notion of freedom varies greatly between cultures.	The principle of freedom is fundamental in democratic societies.	Einstein's theory of relativity revolutionized our understanding of space and time.
Registro	Neutro	Neutro	Neutro	Neutro	Neutro
Quão comum	Top 1000 (muito comum)	Top 1000 (muito comum)	Top 2000 (comum)	Top 1000 (muito comum)	Top 1000 (muito comum)
Nível CEFR	B2	A1	B2	B2	B1
Classe gramatical	noun	noun	noun	noun	noun
Colocações	basic, simple, broad, have, grasp, understand, concept of	bright, brilliant, clever, have, come up with, dream up, come into somebody’s brain, come into somebody’s head, come into somebody’s mind, idea about, idea for, idea of, be open to ideas, the germ of an idea, have other ideas, clear, concrete, precise, get, espouse, have, amuse somebody, appeal to somebody, please somebody, idea about, idea behind, idea of, clear, concrete, precise, get, espouse, have, amuse somebody, appeal to somebody, please somebody, idea about, idea behind, idea of	absurd, foolish, misguided, have, challenge, debunk, notion of	high, founding, guiding, abandon, betray, compromise, against your principles, on principle, a matter of principle, a man/​woman of principle, basic, broad, central, violate, embody, embrace, apply, underlie something, underpin something, in principle, principle behind, the pleasure principle, the precautionary principle, the uncertainty principle	scientific theory, theory of relativity, theory in practice, theory and practice
Antônimos	reality, fact	reality, fact	reality, fact	deviation, exception	fact, truth
Erros comuns	Confused with 'conceptual' as an adjective., Using 'concept' in too casual a context., Mispronouncing it as con-sept instead of con-sept.	Confusing 'idea' with 'idear' which is incorrect., Using 'idea' as a verb; it is only a noun., Mispronouncing 'idea' by not emphasizing the second syllable.	Confusing 'notion' with 'motion' (they sound similar)., Using 'notion' when 'fact' is intended., Overusing 'notion' in casual conversations.	Confused with 'principal', which means head of a school or main., Incorrectly pluralized as 'principles' when speaking about a single rule., 'Principle' used in a context that requires 'principled' (adjective form).	Confused with 'hypothesis'; a theory is more established., Incorrectly used to mean 'theory' as just a guess or opinion.
Notas de uso	Use 'conceito' ao discutir ideias em contextos acadêmicos, técnicos ou criativos. Evite em conversas casuais onde palavras mais simples como 'ideia' podem funcionar melhor. Use 'concept' when discussing ideas in academic, technical, or creative contexts. Avoid in casual conversations where simpler words like 'idea' might work better.	Use 'ideia' tanto em contextos falados quanto escritos. É adequado para a maioria das situações, mas frases mais formais como 'conceito' podem ser melhores em ambientes acadêmicos. Use 'idea' in both spoken and written contexts. It is suitable for most situations, but more formal phrases like 'concept' may be better in academic settings.	Use 'notion' in contexts where discussing concepts or beliefs. This word is appropriate in both spoken and written language but leans more towards academic or philosophical discussions.	Usado em discussões sobre ética, leis ou crenças pessoais. Evite usar em conversas casuais para manter a clareza, pois 'principle' pode ser confundido com 'principal', que se refere a uma pessoa em posição de autoridade. Used in discussions about ethics, laws, or personal beliefs. Avoid using in casual conversations to maintain clarity, as 'principle' can be confused with 'principal', which refers to a person in a position of authority.	Usado em contextos acadêmicos e cotidianos. Evite em conversas casuais, a menos que esteja discutindo ideias ou conceitos. Used in academic and everyday contexts. Avoid in casual conversations unless discussing ideas or concepts.

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I understand therapy as a concept.

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So he gives himself the idea.

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Perguntas frequentes: Concept vs Idea vs Notion vs Principle vs Theory

Qual é a diferença entre Concept, Idea, Notion, Principle e Theory?

Concept: An idea or a plan in your mind. Idea: A thought or suggestion about something. Notion: An idea or belief about something. Principle: A basic truth or rule that guides behavior Theory: An idea or explanation that tries to explain something.

Concept, Idea, Notion, Principle e Theory estão no mesmo nível CEFR?

Concept: B2, Idea: A1, Notion: B2, Principle: B2, Theory: B1 na escala CEFR.

Que classe gramatical são Concept, Idea, Notion, Principle e Theory?

Concept: noun, Idea: noun, Notion: noun, Principle: noun, Theory: noun.

Pode mostrar um exemplo de cada?

Concept: The concept of freedom varies greatly from one culture to another. Idea: She had a brilliant idea for a new invention. Notion: The notion of freedom varies greatly between cultures. Principle: The principle of freedom is fundamental in democratic societies. Theory: Einstein's theory of relativity revolutionized our understanding of space and time.

Posso usar Concept, Idea, Notion, Principle e Theory de forma intercambiável?

Nem sempre. Concept, Idea, Notion, Principle e Theory são relacionadas e às vezes se sobrepõem, mas diferem em registro, frequência e uso, então trocar uma pela outra pode mudar o sentido ou o tom. Veja as diferenças acima antes de substituir.