noun. ['ˈgaɪdˌlaɪn'] a rule or principle that provides guidance to appropriate behavior.
noun. ['ˈgaɪdˌlaɪn'] a detailed plan or explanation to guide you in setting standards or determining a course of action.
noun. ['ˈgaɪdˌlaɪn'] a light line that is used in lettering to help align the letters.