Although generalization is typically described in the methodological literature as both a goal and achievement within quantitative research traditions, qualitative research is often presumed to be incapable of and, in some cases, unconcerned with generalization. However, the concept of generalization is much less bounded than it might appear at first blush. In fact, it has multiple senses and applications, some of which are more applicable in some areas of research than in others. In this article, we present a conceptual analysis of generalization and related concepts. We begin with an analysis of ordinary language uses and then move to more "technical" uses within scientific discourse. We highlight accounts given in the general philosophy of science literature as well as prescribed and actual uses in psychological research within domains in which quantitative and qualitative methods, respectively, have historically been privileged. Finally, drawing from the different kinds of generalizations that feature within and across quantitative and qualitative research, we sketch some points that researchers might keep in mind when considering whether and how generalization plays out in their research.