One of the parts into which anything is furcated or divided; a prong; a branch of a stream, a road, etc.; a barbed point, as of an arrow.
A point where a waterway, such as a river, splits and goes two (or more) different directions.
(geography) Used in the names of some river tributaries, e.g. West Fork White River and East Fork White River, joining together to form the White River of Indiana
(figuratively) A point in time where one has to make a decision between two life paths.
(chess) The simultaneousattack of two adversary pieces with one single attacking piece (especially a knight).
(computer science) A splitting-up of an existing process into itself and a child process executing parts of the same program.