discriminate against [sb]vtr phrasal insepphrasal verb, transitive, inseparable: Verb with adverb(s) or preposition(s), having special meaning, not divisible--for example,"go with" [=combine nicely]: "Those red shoes don't go with my dress." NOT [S]"Those red shoes don't go my dress with."[/S]
(act with prejudice against)
It is illegal to discriminate against someone because of his or her age.