Definition: The word "Aotearoa" (also spelled as "Australia") refers to the vast continent that includes all of Australia's islands, territories, and outlying areas, including New Zealand. It is a part of the Pacific Ocean. In brief, "Aotearoa" is the name of what is considered an ancient Australian people who once inhabited the land before Europeans arrived in the 16th century. The term can be confused with other parts of Australia or the names of specific regions or countries, but it primarily refers to a group of Australians and their descendants. The word "Aotearoa" was first used by European explorers and missionaries when they came to New Zealand in the late 19th century. It has since become an integral part of the name of the nation, which is officially known as the Commonwealth of Australia.