# idea

/aɪˈdiə/ (US) · /aɪdˈiə/ (UK)

Source: https://englishreference.com/word/idea
Updated: 2026-06-19

## Senses

### 1. a plan or suggestion

noun · CEFR A1

a plan or suggestion for a way to do something.

For teachers: a formulated plan, suggestion, or intention for a specific course of action.

- I have a great idea for a new game we can play tonight.
- The marketing team presented a brilliant idea for the summer campaign, focusing on interactive social media content rather than traditional ads.

### 2. a thought or concept

noun · CEFR A1

a thought or an understanding of something in your mind.

For teachers: a mental concept, notion, or image formed by the mind or recalled from memory.

- 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.

### 3. an opinion or belief

noun · CEFR B1

an opinion or belief about something.

For teachers: a belief, opinion, or doctrine held by an individual or a group.

- 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.

### 4. a vague feeling

noun · CEFR B1

a feeling or a guess that something might be true.

For teachers: 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.

### 5. philosophical archetype

noun · CEFR C1 · Academic · Formal

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

For teachers: 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.

### 6. musical theme

noun · CEFR C2 · Technical

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

For teachers: 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.

## Examples

- I have a great idea for a new game.
- The team met for an hour to share every idea they had for the upcoming marketing campaign.
- The philosopher explored the idea that true justice cannot exist without complete transparency in government.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.