The use of pronouns, or pronomial use, within daily interactions is often viewed as a person marker that verbalizes the perceived relationship between the two interactants. Given the importance of such markers, the study of pronomial usage in everyday talk can provide important clues to communication researchers about the level of solidarity, or closeness, between two individuals. Establishing the level of solidarity within the relationship provides researchers with additional information on the communication patterns unfolding within each interaction and how the broader community identity impacts each conversation. This entry defines pronomial usage, explores how solidarity is enacted through pronouns, and illustrates how communication researchers analyze solidarity through the use of pronouns in daily interactions.