I noticed some folks refer to reprintings of later sets, like Seaside, Alchemy, and Dark Ages that incorporate minor updates like bigger fonts for the text, better layouts for them, and some clarifications (that may or may not work differently, but are still minor none of the less).
Contrast that to Dominion 2nd Edition and Dominion: Intrigue 2nd Edition that are "actual" 2nd editions. As folks may be aware, not only did these 2 sets get all the updates mentioned above, but their Kingdom cards were overhauled such that x number of them from each set were removed, and replaced with x more that were deemed to be better, improving their respective sets overall.
Should the term "edition" be Reserved only for those first 2 sets, or does it not really matter in the whole Scheme of things? I have folks using the term "edition" for all Dominion sets, and I'm not really perturbed I can tell by context, and know well enough. However, when I talk with other gamers (IRL and online), I make sure to clarify that "edition" for the 1st two sets do have an extra meaning if I suspect such clarification is in order.