Frequency: The word is one of the 3000 most common words in English.
1.
A segment of something is one part of it, considered separately from the rest.
...the poorer segments of society.
...the third segment of his journey.
= section
N-COUNT: N of n
2.
A segment of fruit such as an orange or grapefruit is one of the sections into which it is easily divided.
N-COUNT
3.
A segment of a circle is one of the two parts into which it is divided when you draw a straight line through it.
N-COUNT: usu N of n
4.
A segment of a market is one part of it, considered separately from the rest.
Three-to-five day cruises are the fastest-growing segment of the market...
Women's tennis is the market leader in a growing market segment-women's sports.
N-COUNT
5.
If a company segments a market, it divides it into separate parts, usually in order to improve marketing opportunities. (BUSINESS)
The big six record companies are multinational, and thus can segment the world market into national ones.
VERB: V n into n