segmentとは何ですか？ segmentとは何ですか？ Any of the parts into which something can be divided: segments of the community; a segment of a television program. Mathematics The portion of a line between any two points on the line.Mathematics The area bounded by a chord and the arc of a curve subtended by the chord.Mathematics The portion of a sphere cut off by two parallel planes.Biology A clearly differentiated subdivision of an organism or part, such as a metamere.To divide or become divided into segments.