Definition of "chivalrous"

Among boys there are laws of honour and chivalrous codes, not written, or formally taught, but intuitively understood by all, and invariably acted upon by the loyal and the true.

1859, George Meredith, chapter 5, in The Ordeal of Richard Feverel. A History of Father and Son. […], volumes (please specify |volume=I to III), London: Chapman and Hall

It amazed me that I could have allowed myself to be let in for a binge of this description simply because a woman wished it. Too bally chivalrous for our own good, we Woosters, and always have been.

1960, P[elham] G[renville] Wodehouse, “VII and XXI”, in Jeeves in the Offing, London: Herbert Jenkins