1. treating people differently through prejudice: unfair treatment of one person or group, usually because of prejudice about race, ethnicity, age, religion, or gender
2. ability to notice and value quality: the ability to appreciate good quality or taste
3. awareness of subtle differentiation: the ability to notice subtle differences
4. electronics signal selection: the selection of a transmitted signal with a specific characteristic, e.g. frequency, by elimination of signals with other characteristics, using a discriminator
