Fascinating. I am only familiar with this definition of the word! To me, "nonplussed" has always meant "unimpressed, indifferent", adjacent (but not quite ident

Fascinating. I am only familiar with this definition of the word! To me, "nonplussed" has always meant "unimpressed, indifferent", adjacent (but not quite identical) in meaning to "nonchalant". I love watching language evolve before my very eyes, it's literally the coolest thing ever!