to imply that infinity simply IS also implies it's definable, which is also contradictory to its nature. to use a vonnegut-ian reference, numbers exist as points, whereas infinity exists more as an indefinable wave. to count to infinity equates to continuously increasing throughout the realm of known and unknown numbers without ending.
as it relates to comics. infinity is synonymous with the terms unlimited, limitless, etcetera. "no peak," "no ceiling," and so on, when applied to potential for anything. it's a commonly used term, and reference, in the comic community. omega level mutants, magic people, and apparently hulk.
and if the objection to hulk gaining mass from another dimension has any grounds, so should the idea of wolverine healing [with no explanation beyond the simple mechanics of human/animal cellular replication] from a skeleton.