Mokṣa means liberation and is generally meant to convey the meaning of the deliverance of the soul from recurring births. The Jīvātmā enshrined in the body has the delusion that it enjoys or suffers happiness or woe. In truth it neither suffers nor enjoys anything. It is detached from all. It is the Supreme Being (Parabrahman). When Jīvātmā deserts its woes it gets mokṣa i.e. Jīvātmā gets merged with Paramātmā. When once Jīvātmā merges with Paramātmā, Jīvātmā is devoid of happiness or woes. It need not be enshrined in any body. A Jīvātmā getting released from one body joins another new body and thus a Jīvātmā in succession enters thousands of bodies and each time without knowing the absolute Truth laments over its woes. In the words of a Ṛṣi it is explained thus: “Jīvātmā, which is bliss in itself living in births after births searches for bliss elsewhere just as a person wearing a golden necklace round his neck searches for the same elsewhere.” The passage of Jīvātmā from one birth to another and the bodies that enshrine it each time constitutes the worldly life. When once a Jīvātmā thus involved in Saṁsāra (mundane existence) gets real knowledge, the knowledge that Jīvātmā and Paramātmā are one and the same, then that Jīvātmā gets final emancipation, liberation from recurring births. It merges with Brahman. This is called Mokṣa.
Note: 1) Jīvātmā = The individual soul enshrined in the human body imparting to it life, motion and sensation as opposed to Paramātmā. Paramātmā = The Supreme spirit or Brahman Saṁsāra = The circuit of life consisting of births and rebirths with sufferings and enjoyments of woes and happiness.]