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 City of Philadelphia (June 17,. Discrimination means treating a person 'less favourably' than someone else, because of protected characteristics outlined in the Equality Act 2010. United States, Ohio, Oxford Retreat Woods. Full Record Details. BPI. Effect; without discrimination on any grounds. " Oxford Dictionary of English 591.