The **ampere (A)**, often shortened to **amp**, is the **SI unit of electric current**. It measures the flow of electric charge through a conductor.
In simple terms, an ampere represents the amount of charge (in coulombs) passing through a point in a circuit per second. Specifically, **1 ampere** is defined as the flow of **1 coulomb** of charge passing through a conductor every **second**.
Mathematically:
\[
1 \, \text{ampere} = 1 \, \frac{\text{coulomb}}{\text{second}}
\]
So, an ampere tells you how many electrons (or charges) are moving through a wire or circuit each second.