Several definitions of majority and minority groups can be found in the social psychological literature. They involve numeric size, power/status, and counternormative position, but size is most commonly used in experimental research to manipulate minority/minority status. Does this practice mirror real-world conceptualizations? To address this question, 77 participants were asked to describe majority and minority groups using a structured openended measure. Content analysis of their responses revealed that majority and minority groups were conceptualized along eight dimensions, which included power, number, distinctiveness, social category, group context, dispositions, and being the source or target of behavior. Although these dimensions were relevant to both majorities and minorities, they often were applied differentially. Also, minorities were associated with more divergent thinking and viewed more negatively than were majorities. On the basis of these findings, a new typology of groups was proposed that could be used in future experimental research to advance our understanding of majorities and minorities.