[mass noun]improper, illegal, or negligent professional activity or treatment, especially by a medical practitioner, lawyer, or public official (尤指开业医师、律师或政府官员)玩忽职守;失职,渎职;徇私舞弊 victims of medical malpractice. 医疗事故的受害者。 [count noun]investigations into malpractices and abuses of power. 对徇私舞弊和滥用职权的调查。