unusually great in size or amount or degree or especially extent or scope; "huge government spending"; "huge country estates"; "huge popular demand for higher education"; "a huge wave"; "the Los Angeles aqueduct winds like an immense snake along the base of the mountains"; "immense numbers of birds"; "at vast (or immense) expense"; "the vast reaches of outer space"; "the vast accumulation of knowledge which we call civilization"- W R Inge
If you describe something as immense, you mean that it is extremely large or great. an immense cloud of smoke With immense relief I stopped running. = enormous + immensity im·men·si·ty The immensity of the universe is difficult to grasp. extremely large = enormous (immensus, from mensus )