Definitions of hieratic:

• noun:   a cursive form of Egyptian hieroglyphics; used especially by the priests
• adjective:   adhering to fixed types or methods; highly restrained and formal

  Example: "The more hieratic sculptures leave the viewer curiously unmoved"

• adjective:   written or belonging to a cursive form of ancient Egyptian writing

  Example: "Hieratic Egyptian script"

• adjective:   associated with the priesthood or priests

  Example: "Hieratic gestures"