The term 'Complete Duration' can be summarized as a period of time that is uninterrupted and fully realized. It is often used to refer to the amount of time it takes for something to be finished or accomplished. The crossword solution for this term is 'SPAN', which is defined as the length of time between two points or events. This term is commonly used to describe the length of time between the beginning and end of a task, project, or event.