Treating one or more members of a specified group unfairly as compared with other people. What does the noun discrimination mean?The practice of treating someone or a particular group in society less fairly than others. Discrimination is an action or practice that excludes, disadvantages, or merely differentiates between individuals or groups of individuals Summary. A growing number of studies are utilizing different sorts of behavioral indicators as measures of prejudice and discrimination. Discrimination means treating a person 'less favourably' than someone else, because of protected characteristics outlined in the Equality Act 2010. People who experience discrimination based on any protected categories can contact the PCHR to file a complaint.