a thought, concept, or image actually or potentially present in the mind
a formulated thought or opinion
whatever is known or supposed about something; a belief
an indefinite or vague impression
a plan of action
an individual's conception of the perfect or typical example of something specified
My idea of an agreeable person is a person who agrees with me — Disraeli
the central meaning or aim of a particular action or situation
the idea of the game
(often Idea) esp in the philosophy of Plato, a transcendent entity of which existing things are imperfect representations
to begin to have inappropriate, undesirable, or unrealistic thoughts, desires, or expectations
to cause somebody to get ideas
not to know at all
that's a worthwhile suggestion
informal that's right
informal that is ridiculous, unreasonable, etc