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. In plain English, to discriminate means distinguishing, singling out, or making a distinction. We discriminate all the time in everyday life. Discrimination is defined as an Unfavorable Action taken because of an individual's actual or perceived Protected Category. Discrimination is the process of making unfair or prejudicial distinctions between people based on the groups, classes, or other categories to which they belong Discrimination is the practice of treating one person or group of people less fairly or less well than other people or groups. To discriminate means to treat those people in some way differently than other people who are not in the same class. (see discrimination; racial discrimination; gender discrimination; LGBTI rights; age discrimination). 2.