"To have a surplus" means to have more of something than what is needed or required. It refers to having an excess or an extra amount of something.
Sentences with «to have a surplus»
Despite what some people might think, a lot of single adults don't have a surplus of discretionary income that they can just throw at online dating. (singleroots.com)
Of course there are areas in which we could improve, but I believe that we already have a surplus in our climate account. (treehugger.com)
I bought two fabrics which I have no idea what to do with as I already have a surplus of baby blankets. (rookiemoms.com)