An endpoint is the final point where something stops or concludes. In mathematics, when you draw a line segment from point A to point B, those two points are the endpoints because the line doesn't continue beyond them. Think of it like the period at the end of a sentence: it marks where things come to a definite stop.

The word appears in many contexts with this same basic meaning. In a scientific experiment, researchers define an endpoint to know when their study is complete. They might say, “The endpoint of our plant growth study is when the seedlings reach six inches tall.” In medicine, doctors talk about treatment endpoints to know when a patient has recovered or when a therapy should stop.

In technology, an endpoint can mean any device that connects to a network, like your laptop, phone, or tablet. These devices are called endpoints because they sit at the “end” of the network connection, where information starts or finishes its journey. When your school's IT department talks about managing endpoints, they mean keeping track of all the computers and devices connected to the school's network.

The concept helps people communicate clearly about boundaries and goals. Instead of wondering “how long should this continue?” or “when are we done?” defining an endpoint gives everyone a clear target to work toward.