Fall to Earth is a phrase that describes the descent of an object from the sky to the ground. It is often used to describe the motion of a meteorite or other celestial body, as well as the return of a spacecraft to the Earth's surface. The term can also be used to describe the descent of a person or object from a high place. In this case, the crossword solution for the term Fall to Earth is DROP, a four-letter word meaning to move or fall suddenly and quickly.