idea meaning and definition

IDEA noun

Definition of idea (noun)

1. the content of cognition; the main thing you are thinking about
   • "it was not a good idea"; "the thought never entered my mind"
   • synonyms: thought
2. 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"
   • synonyms: mind
3. a personal view
   • "he has an idea that we don't like him"
4. an approximate calculation of quantity or degree or worth
   • "an estimate of what it would cost"; "a rough idea how long it would take"
   • synonyms: approximation, estimate, estimation
5. (music) melodic subject of a musical composition
   • "the theme is announced in the first measures"; "the accompanist picked up the idea and elaborated it"
   • synonyms: melodic theme, musical theme, theme