to treat a person or particular group of people differently, especially in a worse way from the way in which you treat other people, because of their race, gender, sexuality, etc.

She felt she had been discriminated against because of her age. 她认为自己受到了年龄歧视。

In order to increase the number of female representatives, the selection committee decided to discriminate in favour of women for three years. 为了增加女性代表的人数，选拔委员会决定在3年内对妇女给予特别照顾。

to be able to see the difference between two things or people

Police dogs can discriminate between the different smells. 警犬能辨别各种不同的气味。