Idea
Part of speech: noun
Definition: 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. That which exists in the mind as the result of mental activity; a thought or a concept Someone's opinion, belief or conviction that is accepted as true An intuitive notion; a feeling or hunch A plan or scheme for doing something, or an intention A musical theme or melodic subject
Ideal
Part of speech: adjective
Definition: Optimal; being the best possibility.Perfect, flawless, having no defects.Existing only in the mind; conceptual, imaginary.
Part of speech: noun
Definition: A perfect standard of beauty, intellect etc., or a standard of excellence to aim at.A subset of a partially ordered set comprising an element and all elements less than it.A subring closed under multiplication by its containing ring.