One of the essential atarting points of any branch of science is a consistent, broadly understood terminology. Generally accepted definitions of key terms within a discipline are important in order to judge claims by scholars about a given topic. Fortunately, among those who work on the topic of nationalism, there is a growing convergence of definitions of “nation” and “nationalism.” Unfortunately, both terms are often still misused, used loosely, or used inconsistently, especially among those in political science who discuss these terms in passing. Authors of introductory textbooks, who are careful in their usage of other terms, often use these two words in varying—and even contradictory—ways in different parts of the same book. Because of their importance for the discipline, however, political scientists should be very mindful of their use of the terms “nation” and “nationalism.”

In this article, definitions for “nation” and “nationalism” are proposed, with each definition followed by sections on common ways the terms are misemployed in political science. I provide examples of both misuses and “loose uses.” While the line between misuse and loose use is somewhat fuzzy (a point reinforced below in the discussion of nations vs. ethnic groups), I consider a misuse to be one in which the term is used in a way that is completely outside how the term is used by nationalism scholars. A loose use is one in which the author has captured only part of the concept or has stretched the meaning of the term to an extreme degree.