I once remarked to an American guest in my Cambridge college, Christ's College [alma mater of Milton, Darwin...], that I had been 'at school' with a quite distinguished actor on our tv. "What, here at Christ's?" she enquired. No, of course not; that was my university, or college ~~ but never, as in her American-thinking mind, my "school". I was referring to Hendon County Grammar School, which I attended 11-18, 1943-50. That is the sort of usage I was asking about. Americans, whatever you say, Spaw, do use 'school', at least colloquially, to mean college or university ~~ as in, e.g., "Where did you go to school?" "Cornell."

This might, on Shakespearean evidence, once have existed here as an obsolete usage ~ "Go not to school at Wittenberg," enjoins Hamlet's mother, meaning he should not go back to his university for the new term; but it is entirely obsolete now.

~Michael~