What does nous mean in the philosophy of Plotinus?

In the philosophy of Plotinus, nous (often translated as "Intellect" or "Spirit") is the first derived reality that proceeds from the One, or the Good. It serves as an essential intermediary between the transcendent One and the rest of the universe.12

Key aspects of nous in Plotinian thought include:

• Nature of Intellect: Plotinus describes nous as a mind that is perfectly unified with its object of thought. It is simultaneously the thinker, the act of thinking, and the object being thought.1
• World of Forms: As the object of its own contemplation, nous constitutes the realm of Platonic forms—the totality of real being and the archetypes that structure all lower levels of reality.12
• Living Subjects: The forms within nous are not static objects but living, thinking subjects; in their contemplation, each form encompasses the whole.1
• Human Ascent: Humans possess the potential to become intellects. By moving beyond sense perception and discursive reasoning, individuals can achieve a state of awareness where they immediately grasp eternal realities, marking a crucial step in the return to the One.1

Ultimately, nous is eternal and timeless, acting as the creative source from which the Soul proceeds to order the material world.1