Back fall is a term used to describe a type of physical movement. It involves falling backwards onto the ground, usually from a standing position. The term can also be used to describe a situation in which something recedes or moves away from a certain point. The crossword solution for back fall is 'RECEDE, ' which means to move away from a certain point. This term is often used to describe a situation in which something gradually decreases or moves away from a certain point.