Downrange's the horizontal distance traveled by a spacecraft, or the spacecraft's horizontal distance from the launch site. More often, it's used as an adverb or adjective specifying the direction of that travel being measured in a horizontal direction. In military slang, downrange's a term for being deployed overseas, usually in a war zone. It's also the name of a comic strip published in the newspaper Stars and Stripes.… (More on Downrange)