As a Noun:
1. A person who was living in Australia when the first Europeans arrived or anyone who can trace their ancestory to them. English = Aborigine, aboriginal Australian, indigenous Australian.
As a Verb or Adjective:
1. Relating to a person who was living in Australia when the first Europeans arrived or anyone who can trace their ancestory to them, or the culture of these peoples. English = aboriginal.
Note:
1. This is increasingly becoming the most widely used sign for "Aborigine" or "aboriginal Australian".