Definition 1: To ask someone to make you understand something. Most of the time something questionable or with no answer.
Definition 2: Asking someone if they understood or heard what you said.
Def 1- Guy 1: Can someone comperstand for me why the hell on beyblade they shoot beyblades from helicopters?
Guy 2: ...I dont know.
Def 2- Guy 1: Hey man can you get me a Dr. pepper?
Guy 2: Huh? What did you say?
Guy 1: Did you not comperstand me? I said to get me a Dr. pepper while youre up.
Guy 2: Oh ok.