It can also be used as the feminine form of "desconocido" (unknown) and can refer to:
* An unknown person or thing: "La mujer desconocida dejó un mensaje." (The unknown woman left a message.)
* Something that is not recognized or identified: "La causa de la explosión es desconocida." (The cause of the explosion is unknown.)
It's important to consider the context to determine the best translation of "desconocida".