The use of “hey” in place of “hello”.
I never paid this much attention until my dad mentioned today that it’s never sounded right to him when people say “hey” instead of “hi” or “hello”. I’ve been using it this way for at least 20 years, but I looked it up in various dictionaries and haven’t yet found a definition consistent with this usage. Most references just define it as “an interjection used to call attention” or something similar and leave it at that. Any thoughts or references that might shed some light?