cross-examine (someone)
1. In law, to question a witness or suspect after the opposing side has already done so, as to undermine or clarify their testimony. I have doubts that that witness is telling the truth, and I'll expose it when I cross-examine him. This guy has seemed terrified from the moment he took the stand—there's no way he'll hold up when I cross-examine him. A: "The witness' timeline is not adding up, is it?" B: "Nope, and I will press her on that when I cross-examine her."
2. By extension, to question someone thoroughly. Geez Mom, why are you cross-examining me? I told you the truth—I was at Kelly's house all night. My ex-boyfriend was so controlling—he would practically cross-examine me if I'd go anywhere or see anyone without him. I know the cops want to cross-examine me, but I can't help them—I wasn't here when the place was robbed.
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