I have heard people use the word segway in a sentence but they talking about scooter. What does mean?

You're right! It's a bit confusing, but it's a common mistake.

"Segway" is a brand name for a self-balancing, two-wheeled electric vehicle. Think of it as a modern-day "hoverboard" but more stable.

However, people often use "Segway" as a generic term for any kind of electric scooter, even if it's not made by the Segway company. This is similar to how people use "Kleenex" to refer to any tissue paper.

So, when someone says "I rode a Segway to the store", they might be talking about a real Segway, or they could be talking about a scooter from another brand.

To avoid confusion, it's always better to be specific and name the actual brand of the scooter if you know it.