|The content of cognition; the main thing you are thinking about.|
It was not a good idea.
The thought never entered my mind.
|Your intention; what you intend to do.|
He had in mind to see his old teacher.
The idea of the game is to capture all the pieces.
|An approximate calculation of quantity or degree or worth.|
An estimate of what it would cost.
A rough idea how long it would take.
|(music) melodic subject of a musical composition.|
The theme is announced in the first measures.
The accompanist picked up the idea and elaborated it.