In Spanish law. The condition of a prisoner who is not permitted to see or to speak with any person visiting him during his confinement A person accused cannot be subjected to this treatment unless it be expressly ordered by the judge, for some grave offense, and it cannot be continued for a longer period than is absolutely necessary. This precaution is resorted to for the purpose of preventing the accused from knowing beforehand the testimony of the witnesses, or from attempting to corrupt them and concert such measures.