not precisely limited, determined, or distinguished; "an undefined term"; "undefined authority"; "some undefined sense of excitement"; "vague feelings of sadness"; "a vague uneasiness"
seemingly boundless in amount, number, degree, or especially extent; "unbounded enthusiasm"; "children with boundless energy"; "a limitless supply of money"
having no limits in range or scope; "to start with a theory of unlimited freedom is to end up with unlimited despotism"- Philip Rahv; "the limitless reaches of outer space"