What is referred to as the ultimate truth and law in Buddhism?

In Buddhism, the term that is referred to as the ultimate truth and law is Dharma. Dharma encompasses the teachings of the Buddha, which provide guidance on how to live ethically, understand the nature of reality, and achieve enlightenment. It represents the universal truths that govern the cosmos and the ethical framework within which individuals should operate to attain spiritual progress and liberation from suffering.

While karma refers to the law of moral causation and the consequences of one's actions, it does not encompass the entirety of the Buddhist teachings or ultimate principles. Samadhi pertains to a meditative state of concentration and is a practice rather than a principle or truth. Zen, while a significant school within Buddhism focusing on meditation and direct experience, is not a term that represents ultimate truth or law in the broader sense of Buddhist philosophy. Thus, Dharma stands out as the foundational and overarching concept of ultimate truth and law in Buddhism.