Dharma or Dhamma in Buddhism basically refers to the 4 noble truths and the 8-fold path set by Buddha.

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Dharma plays a vital role in all religions that arise from Sanatana Dharma.
It refers to the moral law that governs social conduct, and is one of the four pillars of a well-balanced life (the others being artha, kama and moksha).

Dharma/Dhamma

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Types of Dharma

In Hinduism, various Dharam shastra texts (books explaining laws of conduct) such as the Manusmriti dictate and govern a believer's behavior. 

The Manusmriti (book containing laws laid down by the first man, Manu) explains not only the creation of the world but also Sanskriti (civilization). It also jots down the source of Dharma, the Dharma of the 4 social castes, and the law of karma, rebirth and final liberation.

Dharma in Hinduism

Dhamma in Buddhism

Dharma here refers to the teachings or the spiritual path set by one's guru when one sets out on a spiritual path. According to the Tattvartha Sutra (religious book), there are 10 righteous virtues which classify themselves under Dharma.

Jainism also goes on to mention that upon following one's Dharma, it provides more meaning to one's Dravya  (Aatma-gyaan).

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