Solipsism (pronounced: // (listen)) is a view in philosophy that a person has no reason to believe anything exists except their own mind. It mainly means to reject or doubt that other people exist. Some kinds of solipsism say that everything outside a person's own mind (including other people) is only imaginary. Other kinds of solipsism instead say that nothing outside a person's own mind is certain.
To only reject that the physical world exists is not solipsism. Solipsism also rejects or doubts that other people exist. As an epistemological position, it is the concept that nothing but one's own mind can be certain to exist. The existence of other minds, in this position, is considered a possibility, but not a certainty. Including time, which does not stop just because there would be nobody being to experience it (which is probably going to happen in the end of the universe when there would be simply nothing)