A segment of something is one part of it, considered separately from the rest.
例句
...the poorer segments of society.社会中的较贫穷阶层...the third segment of his journey.他此行的第三程
N-COUNT
(橘子、葡萄柚等水果的)瓣
A segment of fruit such as an orange or grapefruit is one of the sections into which it is easily divided.
N-COUNT
圆缺;弓形
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
(市场)细分的部分
A segment of a market is one part of it, considered separately from the rest.
例句
Three-to-five day cruises are the fastest-growing segment of the market...3 至 5 天的乘船游览是该市场中发展最快的部分。Women's tennis is the market leader in a growing market segment — women's sports.女子网球正引领着一个逐渐壮大的市场——女子运动市场。
VERB
细分，划分(市场)
If a company segments a market, it divides it into separate parts, usually in order to improve marketing opportunities.
例句
The big six record companies are multinational, and thus can segment the world market into national ones.六大唱片公司都是跨国经营，因此能够将世界市场按国家划分。