Treating one or more members of a specified group unfairly as compared with other people. Discrimination is an action or practice that excludes, disadvantages, or merely differentiates between individuals or groups of individualsWhat does the noun discrimination mean? The practice of treating someone or a particular group in society less fairly than others. Discrimination arising from disability, and failure to make reasonable adjustments. Together these elements are both known as 'prohibited conduct'. DISCRIMINATION meaning: 1. Treating a person or particular group of people differently, especially in a worse way from the…. To "discriminate" against someone means to treat that person differently, or less favorably, for some reason. The inability or refusal to recognize the rights, needs, dignity, or value of people of particular races or geographical origins.