What is the definition or description of: meningocele?

Meningocele. Meningocele is a hernial protrusion of the meninges (brain or spinal linings) through a defect in the cranium (head bones), (cranial m.), or vertebral column (spinal m.) .
A spinal defect. A meningocele is a congenital defect of the vertebral arches of the spine with protrusion of the lining of the spinal fluid sac (meninges), usually without an abnormality of the spinal cord or nerves.