What is Dharma?

Google's first two definitions of "dharma" are as follows:

• basic principles of the cosmos; also: an ancient sage in Hindu mythology worshipped as a god by some lower castes;
  wordnetweb.princeton.edu/perl/webwn
• The term (Sanskrit: '', dhamma) is an Indian spiritual and religious term that means one's righteous duty, or any virtuous path. A Hindu's dharma is affected by a person's age, class, occupation, and gender. In Indian languages it can be equivalent simply to religion, depending on context. ...
  en.wikipedia.org/wiki/Dharma

Links:

What is Dharma? - article by Ramesh Manocha