Does high pH mean more acidic?

No, high pH means less acidic and more basic. Low pH means more acidic. 

The pH value of any substance can range from 0 to 14, with 7 being neutral. If the pH value of the substance is less than 7, it indicates that the substance is acidic. The lower the pH, the stronger the acidity. A pH value that’s greater than 7 indicates a base. The higher the pH value, the stronger the basicity.