I know what the word superannuate means, but I’ve seen it used in the English public school context, and can’t figure out how it applies. In a P.G. Wodehouse story, a character says that he used to be at Eton, but was superannuated the previous term. Yet, as he speaks, he is attending a different school. Superannuate sounds like the character was too old to stay in school, but if that’s the case, how is it that he can attend another school?
Can someone clue me in?