The Sanskrit term Dharma signifies the underlying order in nature and life (human or other) considered to be in accord with that order. The word Dharma is generally translated into English as ‘law’ and in East Asia, the translation for Dharma is法.
For practicing Buddhists, Dharma, is used to mean the teachings of the Buddha, commonly known throughout the east as Buddha-Dharma. The status of the Dharma is highly regarded by Mahayana Buddhists who regard the Buddha as simply an enlightened human being, see the Dharma as the 84,000 different teachings(法门)that the Buddha gave to various types of people based on their propensity and capacity.
“Dharma” usually refers not only to the sayings of the Buddha but also to the later traditions of interpretation and addition that the various schools of Buddhism have developed to help explain and expand upon the Buddha’s teachings.
The Dharma is one of the Three Jewels of Buddhism of which practitioners of Buddhism seek refuge in (what one relies on for his/her lasting happiness). The three jewels of Buddhism are the Buddha (mind’s perfection of enlightenment), the Dharma (teachings and methods), and the Sangha (awakened beings who provide guidance and support).
Dharma Master(法师) is a title of respect used to address a Buddhist Bhikshu (monk) or Bhikshuni (nun). It implies that the person so addressed has mastered the Dharma and is qualified to teach it.
A Dharma talk is a public discourse on Buddhism by a Buddhist teacher or master , A Dharma talk must always be appropriate in two ways: it must accord perfectly with the spirit of the Dharma and it must also respond perfectly to the situation in which it is given. If it only corresponds perfectly with the teachings but does not meet the needs of the listeners, it’s not a good Dharma talk. (上成佛道，下化众生)