- 1a part of something that is separate from the other parts or can be considered separately She cleaned a small segment of the painting. Lines divided the area into segments.
- 2one of the sections of an orange, a lemon, etc.
- 3(geometry) a part of a circle separated from the rest by a single line
- 4 (geometry) a part of a straight line between two points
- 5(phonetics) the smallest speech sound that a word can be divided into