An automatic opener is a device that opens and closes doors, gates, or other barriers without the need for manual operation. The term 'automatic opener' can also refer to a device that opens and closes windows, garage doors, or other objects. The crossword solution for the term 'automatic opener' is 'SEMI, ' which stands for SEMI-automatic. SEMI-automatic openers are devices that require some manual operation, such as pushing a button or turning a key, in order to open or close the door.