Sterling means British money, or something that is very good or excellent.
Sterling has a feeling of high quality or excellence. It can also make people think of the United Kingdom.
Examples:
I have some sterling.
She bought a sterling silver necklace.
The sterling in my pocket is shiny.
He did a sterling job on his homework.
The cake was sterling, the best I ever had!
She is a sterling student, always getting the best grades.