The people of one country united under the same government.

国民；国家。

A race of people having the same religion, language, history, etc.

民族。

Nation denotes a race united under the same government, and having the same religion, language, and history.

Nation 指同宗教、同文字、同历史而受治于同一政府之民族：

People is used of any group of individuals regarded as a unit.

People 为任何一群人民视作一单位者之统称：

It often suggests the idea of the ruled in contrast to the rulers.

此字常含有平民（相对于统治者）之意：

Tribe contains the idea of a common descent, and is chiefly used of primitive peoples.

Tribe 含同祖先之义，主要用于原始人类者：