idea

noun

1. the content of cognition; the main thing you are thinking about

   noun.cognition

   Examples

   It was not a good idea.

   Synonyms thought

   Source: WordNet 3.0

2. your intention; what you intend to do

   noun.cognition

   Examples

   The idea of the game is to capture all the pieces.

   Synonyms mind

   Source: WordNet 3.0

3. a personal view

   noun.cognition

   Examples

   He has an idea that we don't like him.

   Source: WordNet 3.0

4. an approximate calculation of quantity or degree or worth

   noun.cognition

   Examples

   A rough idea how long it would take.

   Synonyms approximation estimate estimation

   Source: WordNet 3.0

5. (music) melodic subject of a musical composition

   noun.communication

   Examples

   The accompanist picked up the idea and elaborated it.

   Synonyms melodic theme musical theme theme

   Source: WordNet 3.0

6. The transcript, image, or picture of a visible object, that is formed by the mind; also, a similar image of any object whatever, whether sensible or spiritual.

   noun

   Source: webster1913