An OPENING, or GAP, is a SPACE between two objects or points. It can be a physical SPACE, such as a hole in a wall, or an abstract SPACE, such as the GAP between two ideas. In the context of a crossword puzzle, the term 'OPENING' or 'GAP' refers to the empty squares that need to be filled in with the correct letters to complete the puzzle. The solution for this particular crossword was SPACE, which is a five-letter word meaning a continuous area or expanse that is free, available, or unoccupied.