Purva Mimamsa, also known as Karma Mimamsa, is a school of Hindu philosophy that focuses on the interpretation of the Vedas and the performance of Vedic rituals. It is considered one of the six orthodox schools of Hinduism and is believed to have originated around the 6th century BCE.

According to Purva Mimamsa, dharma is the fundamental principle that governs the universe and is the basis of all moral and ethical codes. It is often translated as "duty" or "righteousness" and is seen as the ultimate goal of human life.

The Mimamsa school defines dharma as the set of duties and obligations that are prescribed in the Vedas and must be followed by individuals in order to maintain harmony and order in society. These duties include performing Vedic rituals, adhering to moral and ethical codes, and fulfilling one's social and familial responsibilities.

Purva Mimamsa also emphasizes the concept of svadharma, which refers to one's personal duty or role in life. This is determined by one's caste, gender, and stage of life, and it is believed that fulfilling one's svadharma is essential for attaining moksha, or liberation from the cycle of birth and death.

In addition to individual duties, Purva Mimamsa also emphasizes the importance of collective duties, known as samanya dharma. This includes upholding societal norms and values, protecting the environment, and contributing to the welfare of the community.

According to Purva Mimamsa, dharma is not just a set of rules and regulations, but a way of life that is in harmony with the cosmic order. It is believed that following dharma leads to a virtuous and fulfilling life, while neglecting it can result in negative consequences and suffering.

In conclusion, Purva Mimamsa defines dharma as the ultimate principle that governs the universe and provides guidance for human conduct. It encompasses individual and collective duties, and is seen as the path towards moral and spiritual fulfillment.