Wiktionary
n. (proper class English)
Usage examples of "proper classes".
Seeing, for instance, that the oldest known mammals, reptiles, and fish strictly belong to their own proper classes, though some of these old forms are in a slight degree less distinct from each other than are the typical members of the same groups at the present day, it would be vain to look for animals having the common embryological character of the Vertebrata, until beds far beneath the lowest Silurian strata are discovered -- a discovery of which the chance is very small.
Lot more than I ever do with the so-called proper classes, that's for sure.
Lot more than I ever do with the so-called proper classes, that’.
For all bodies from all quarters are assigned by blows each to its appropriate thing and all withdraw to their proper classes.