That is the nutshell definition. More precisely, resilient flooring is defined by an industry group as flooring that is firm, yet has a "give or bounce back."
Thus, carpeting is not resilient flooring because it has "give" but is not firm. Hardwood flooring is not resilient floor because it is firm but has little "give."
Resilient flooring does include cork, linoleum, rubber, and vinyl composition. Yet when you hear the term "resilient floor," the person saying this most likely is referring to vinyl floor.

