1. A stage of mitosis or meiosis in which the corresponding parts of the divided chromosomes move to opposite poles of the spindle.
2. A late stage of cell division during which chromosomes move to the poles of the spindle (a structure consisting of a network of microtubule fibers along which chromosomes are distributed and drawn apart during meiosis [process of cell division during which the nucleus divides into four nuclei] and mitosis [process by which a cell divides into two daughter cells, each of which has the same number of chromosomes as the original cell]).