Ideal

1. Existing in fancy or imagination only; visionary; unreal.
2. A mental conception regarded as a standard of perfection; a model of excellence, beauty, etc.
3. Reaching an imaginary standard of excellence; fit for a model; faultless; as, ideal beauty.
4. Teaching the doctrine of idealism; as, the ideal theory or philosophy.
5. Existing in idea or thought; conceptional; intellectual; mental; as, ideal knowledge.
6. Imaginary.