Definition of Idea

Noun: idea I'dee-u

The content of cognition; the main thing you are thinking about
"it was not a good idea";
- thought
Your intention; what you intend to do
"the idea of the game is to capture all the pieces";
- mind
A personal view
"he has an idea that we don't like him"
An approximate calculation of quantity, degree or worth
"a rough idea how long it would take";
- estimate, estimation, approximation
(music) melodic subject of a musical composition
"the accompanist picked up the idea and elaborated it";
- theme, melodic theme, musical theme