The term 'HISTORIC OPENING' can be summarized by the three-letter word 'PRE', which stands for 'PRECEDING'. This term is used to describe an event or occurrence that happened before another event or occurrence. It is often used to refer to a significant event in history, such as the OPENING of a new business or the launch of a new product. The term 'HISTORIC OPENING' is used to refer to the first time something has been done or experienced, and it is often seen as a momentous occasion.