prep. Latin meaning "for the sake of argument," used by lawyers in the context of "assuming arguendo" that the facts were as the other party contends, but the law prevents the other side from prevailing. Example: "assuming arguendo" that the court finds our client, the defendant, was negligent, the other party (plaintiff) was so contributorily negligent he cannot recover damages. In short, the lawyer is not admitting anything, but wants to make a legal argument only. The word appears most commonly in appeals briefs.