Segment may mean:
- The divisions found in the internal section of a citrus fruit
- Market segment, the smaller subgroups comprising a market
Computing
- Segmentation (memory), the division of computer memory into segments
- Image segment created in computer vision
- String segment, the substring of a pattern delimited by two don't cares or one don't care and beginning or end of the pattern
- Network segment, a part of a larger computer network
- A protocol data unit of the transport layer in computing, e.g. TCP segment
Geometry
- Line segment, part of a line that is bounded by two end points
- Circular segment, the area which is "cut off" from the rest of the circle by a secant or a chord
- Spherical segment, is a portion of a sphere cut off by a pair of parallel planes
Science
- Segmentation (biology), a repeated part of the metazoan body
- Segment (linguistics), a discrete unit of speech
- Segment (rocketry), a controlled rocket motor burn of specified duration