Magnetohydrodynamic (MHD) flow past a flat plate over an outer flow turbulence subjected to a defect-layer has been examined. It finds a novel approach to a Blasius equation with a view to analyze outer flow turbulence by analytical method, neglecting numerical method to describe the physical situation on outer flow which does not seems to appeared in the literature. In a defect-layer it is rigorously stated that outer flow in a defect layer is independent of Reynolds number. To solve Blasius equation subject to boundary conditions it is stated that numerical results are obtained by analytical method. A graphical representation shows that the velocity distribution is merged with different values of Hartmann number (magnetic pressure) so that velocity increases with indefinite period. In this situation, outer flow turbulence in a defect layer holds stress free so that the existence of a magnet field dominates the entire outer flow situation. In relating to the physical situation of interest, the universe is expanding slowly and slowly subject to a Hot Big Bang with a decisive importance to a microwave background of radiation.