A segment is a piece or section of something larger. When you peel an orange, each slice you pull apart is a segment. A segment always has clear boundaries: it has a beginning and an end, separating it from the rest of the whole.

In geometry, a line segment is the part of a line between two points. Unlike a line that extends forever in both directions, a segment stops at both ends, like drawing a straight path between two dots on paper.

The word also describes parts of time or experiences. A television show might have different segments: one segment for news, another for weather, another for sports. Your school day gets divided into segments too: math class is one segment, lunch is another, recess is another.

Scientists and marketers use the word frequently. A biologist might study a segment of an earthworm's body, while a business might divide customers into market segments based on what they like to buy. In each case, the segment is a distinct, identifiable part of something bigger.

Notice that segments aren't random chunks. They're purposeful divisions that make sense: orange segments follow the natural lines inside the fruit, and TV segments organize content logically. When you segment something (using it as a verb), you're dividing it thoughtfully into meaningful parts.