The term 'Mark the Boundaries of' can be summarized by the crossword solution 'DELIMIT, ' which means to set the limits or boundaries of something. This term is often used in reference to setting the boundaries of a physical area, such as a country or region, but it can also be used to refer to the boundaries of an abstract concept, such as a set of rules or regulations. Delimiting is an important part of establishing order and structure in any system.