Does "full range" really mean anything?

OK, what's up with all the people who list as "full range" speakers that, by the manufacturer's own inflated spec sheets, do not claim to be full range? Speakers that only go down to 45 or 50 hz? And if we're gonna fudge the meaning of "full range" doesn't it make more sense to fudge it on the high end, since most people, especially people over 30, can't hear to 20,000hz anyway? I've recently checked my 47-year-old ears and discovered that I'm no longer hearing anything above about 16,000hz. But I'm hearing low-end just fine. I've also been studying the ads here for full-range speakers, waiting for a reasonably priced pair to come available. But I find that most ads for speakers are not, in fact, for full range speakers. Is this just semantics?