a person who comes from a country in the western part of the world, especially North America or western Europe

Some of the Buddhists came from Sri Lanka and Southeast Asia, while others were Westerners by birth. 一些佛教徒来自斯里兰卡和东南亚，而另一些则是土生土长的西方人。

a person who comes from the west of a country, especially the US

Easterners and westerners were equally affected by these changes in American life. 东西部各处的人们都一样受到这些美国生活方面变化的影响。