idea

A1 · Beginner Countable noun

n. a thought or an understanding of something in your mind.

n. a mental concept, notion, or image formed by the mind or recalled from memory.

日本語:考え※

“The book gives you a good idea of what life was like in the past.”

“The abstract nature of the theory makes it difficult for students to grasp the core idea without concrete examples.”

B1 · Intermediate Countable noun

n. an opinion or belief about something.

n. a belief, opinion, or doctrine held by an individual or a group.

日本語:考え※

“People have different ideas about how to raise children.”

“The political philosopher challenged traditional ideas regarding the social contract and the role of the state in private life.”

B1 · Intermediate Countable noun

n. a feeling or a guess that something might be true.

n. a vague notion, impression, or hunch about a situation.

“I had no idea that you were planning a surprise party for me.”

“She had a vague idea that they had met before, though she couldn't recall the specific time or place.”

C1 · Advanced Countable noun Philosophy Academic · Formal

n. the perfect form of something that exists only in the mind.

n. an abstract archetype or pure essence of a thing, often contrasted with imperfect real-world examples.

“Plato believed that every object on earth is just a copy of a perfect idea.”

“In Platonic philosophy, the Idea of the Good is the ultimate object of knowledge, illuminating all other forms.”

C2 · Proficiency Countable noun Music Technical

n. a short piece of melody that a composer uses to build a song.

n. a musical theme, melodic subject, or primary motif within a composition.

“The composer introduces the main musical idea in the first few seconds.”

“The symphony develops a simple four-note idea into a complex web of contrapuntal variations across three movements.”