class of persons etc with some common feature (the race of poets, dandies etc)

Well that's a definition of race which is quite fun, but doesn't bear much relationship to the other definitions, which aren't. Race of folk-singers, race of darts-players, race of men or race of women...Feels a bit strange really.

But the core of the sickness is that preposterous notion of the three great races of humanity, Caucasoid, Mongoloid and Negroid, which is and always has been absolute balderdash. Basically it's on a par with the Protocols of the Elders of Zion, and was promulgated by pseudo-scientists with very much the same kind of mind-set as the people who concocted that evil document. You'll still find it in dictionaries, the same way you'll find definitions of the expression "to jew down" and so forth. Good dictionaries have to include all the meanings which a word has been loaded with at various times.