What is a subspace of a space called, that can effect linear separability in more than three dimensions?

The subspace of a space that can affect linear separability in more than three dimensions is called a Hyperplane. A hyperplane is a subspace of one dimension less than the dimension of the ambient space. In a three-dimensional space, a hyperplane is a flat, two-dimensional subspace. In higher dimensions, hyperplanes can be used to separate data points, which is crucial in many machine learning algorithms.