In Elements of Rhetoric, Whately disabuses the reader of
the common error of supposing that a general term has some real object, properly corresponding to it, independent of our conceptions; — that, consequently, some one definition in every case is to be found which will comprehend every thing that is rightly designated by that term; — and that all others must be erroneous: whereas, in fact, it will often happen, as in the present instance, that both the wider, and the more restricted sense of a term, will be alike sanctioned by use, (the only competent authority,) and that the consequence will be a corresponding variation in the definitions employed; none of which perhaps may be fairly chargeable with error, though none can be framed that will apply to every acceptation of the term. (Richard Whately, Elements of Rhetoric [1828], p. 2)