Kaivalya is the final goal of classical Yoga and Sāṃkhya: the isolation of puruṣa, pure consciousness, from prakṛti, matter. When discriminative knowledge is complete and the qualities of nature have fulfilled their purpose, they return to their source and the seer abides in itself. The Jains use a related word, kevala, for omniscient liberation.
Kaivalya
Isolation or aloneness: liberation in Sāṃkhya and Yoga, when pure consciousness stands free of matter.
Also: Kaivalya