An admission by a party opponent is when the opposing party in a legal case affirms that something is true, making it admissible. This exception includes agents of the opposing party. Admission by a party opponent is considered an exception to the hearsay rule. Note that it differs from an admission against interest (another exception to the hearsay rule) in that an admission against interest is made by someone unavailable for the case. Often, that is a non-party to the case.
In a lawsuit for Title VII employment discrimination, the plaintiff alleges that the defendant insulted them at work using sexist slurs. Before the case goes to trial, the defendant sends the plaintiff an angry email admitting they used the slurs. At trial, the plaintiff can use the email as an admission by a party opponent in support of their claim that they were subjected to sexist slurs at work.
For more detailed information, see our related Evidence terms: