Virat Purusha names the entire manifest cosmos seen as a single vast body, the universe understood not as a collection of separate things but as the physical form of the divine itself. Where Hiranyagarbha is the cosmic mind or subtle body, Virat is Brahman identified with the total gross body, the sum of every star, mountain, ocean, and living creature taken together as one organism. This is not poetic exaggeration but a precise metaphysical claim: that the entire physical universe is, in its totality, a single conscious form.
The image receives its fullest treatment in the eleventh chapter of the Bhagavad Gita, when Krishna grants Arjuna the vision to see his vishvarupa, his universal form. Arjuna sees countless mouths and eyes, countless wondrous forms, the whole universe with its many divisions gathered into the one body of Krishna, all the gods, all the sages, all the worlds, moving and unmoving, present at once within him. It is described as a vision so vast and so overwhelming that Arjuna, terrified, asks Krishna to return to his gentler, human form.
The Purusha Sukta of the Rig Veda offers an older version of the same vision, describing a cosmic being, purusha, with a thousand heads, a thousand eyes, and a thousand feet, who pervades the earth on every side and extends ten fingers beyond it. From the sacrifice of this cosmic being, the hymn says, the different orders of creation, the sun, the moon, the sky, the earth, and even human society, all arose. Virat Purusha, in every version, points to the same recognition: that the universe is not separate from the divine, and that seeing any part of it clearly enough is seeing a fragment of one vast living form.