Sentence:  Our <WSD>Public Schools</WSD>... (by which phrase we never mean real public schools like the Board schools at all, but merely schools for the upper and middle classes) are in their existing stage primarily great gymnasiums. 
Meaning of the word marked with <WSD> tags:  Certain private schools, particularly (initially) any grammar school operated apart from the personal lands of its students or (from the 19th century) the fee-paying secondary schools which developed from or were modelled upon them; a British boarding school