I am running a multiple regression analysis with r. R gives me a Residual standard error of 0.0589 on 95161 degrees of freedom. I know that the 95161 degrees of freedom are my input numbers. What does the Residual standard error tell me?

When running a multiple regression model in R, one of the outputs is a residual standard error of 0.0589 on 95,161 degrees of freedom. I know that the 95,161 degrees of freedom is given by the difference between the number of observations in my sample and the number of variables in my model. What is the residual standard error?