The term 'Series of Things in Order' can be defined as a SEQUENCE, which is an arrangement of items in a specific order. A SEQUENCE can be used to describe a set of numbers, objects, or events that follow each other in a particular order. For example, a SEQUENCE of numbers could be 1, 2, 3, 4, 5, and so on. Similarly, a SEQUENCE of objects could be a set of books arranged in alphabetical order, or a series of events could be a timeline of historical events.