What is Dharma?
The constant process of creation from desire to fulfillment based on the 3 gunas is called Dharma. Dharma "upholds" existence itself. All action or Karma comes from the eternal cycle of Dharma. There are infinite levels of Dharma, just as there are infinite levels of creation. Every individual has their own idea of Dharma based on their own personal desires which in turn are based on Samskaras, or impressions resulting from past action.
Through the process of Yoga or "union" the individual Dharma becomes synonymous with the Dharma of the entire universe.