Final answer:
Idealism is the intellectual position that reality is constructed by ideas in the mind, with an emphasis on mental or spiritual components and a rejection of the material existence.
Step-by-step explanation:
The intellectual position grounded in the notion that reality is constructed is idealism. Idealism is the metaphysical view that associates reality with ideas in the mind rather than material objects. It emphasizes mental or spiritual components of experience and renounces the notion of material existence. Idealists see the mind and spirit as the most essential, permanent aspects of one's being. This perspective is reflected in Plato's theory of forms, which posits that the ideal world of unchanging concepts, like the perfect circle, is the true reality, as opposed to the ever-changing physical world.