Real Dictionary

discriminate
verb: If you can discriminate between two things, you can recognize that they are different.
verb: To discriminate against a group of people or in favour of a group of people means to unfairly treat them worse or better than other groups.

discriminate in American English
involving discrimination; distinguishing carefully
to constitute a difference between; differentiate
to see the difference (between things); distinguish
adjective: marked by discrimination; making or evidencing nice distinctions
intransitive verb: to make a distinction in favor of or against a person or thing on the basis of the group, class, or category to which the person or thing belongs rather than according to actual merit; show partiality
transitive verb: to make or constitute a distinction in or between; differentiate

discriminate in British English
adjective: showing or marked by discrimination
verb: to single out a particular person, group, etc, for special favour or, esp, disfavour, often because of a characteristic such as race, colour, sex, intelligence, etc