Exemplar, perfect, or classic

adjective

1. Of, relating to, or embodying an ideal

   "ideal beauty"

2. Conforming exactly to an ideal, law, or standard perfect

   "an ideal gas"

3. Existing as a mental image or in fancy or imagination only
4. Relating to or constituting mental images, ideas, or conceptions
5. Of or relating to philosophical idealism
6. Existing as an archetypal idea
7. of, relating to, or embodying an ideal
8. conforming exactly to an ideal, law, or standard : perfect
9. existing as a mental image or in fancy or imagination only; broadly : lacking practicality

noun

1. A standard of perfection, beauty, or excellence
2. One regarded as exemplifying an ideal and often taken as a model for imitation
3. An ultimate object or aim of endeavor goal
4. A subset of a mathematical ring that is closed under addition and subtraction and contains the products of any given element of the subset with each element of the ring

noun

1. A point added to the plane or to space to eliminate special cases

noun

1. The perfect type or model

noun

1. The standards, ideals, and ambitions that according to psychoanalytic theory are assimilated from the superego

idiom

1. Not at all good

   "The conditions were far from ideal."