[sofetch]

What's not so standard, in my opinion, is that people be required to restrict their use of language to the noted restrictive sense of a definition as used "in [that] document."

Yes, yes, all of the adjectival disclaimers were used to try to align the discussion directly to how words are used "in [that] document." While the document is highly important, there are many technical contexts in which it is completely appropriate to talk about decades without the slightest consideration of how the same term might be used therein.