digit/number: arbitrarily large/great/increased/many (finite but as big as desired/allowed).
Technically, it means: "For any finite n > 0, there exists a finite x such that n < |x|; this word refers to such an x". This is different from "infinite" in the same way that living literally and truly forever in an undying universe is different from living for as long as was initially desired but for a finite time (and eventually dying). No assumption about signum; the above definition is given in absolute value terms. In other words, the typical meaning of "arbitrarily and positively large" is "ma'uzau'u", meanwhile "arbitarily large in absolute value but negative" is given by "ni'uzau'u". See also: mei'a.