That’s a good example of a subpar use for an LLM. Dictionaries have existed since before computers. Digital dictionaries are faster, more reliable, and less power consuming than any LLM.
Parent's wife is presumably a smart person who found a way to use technology in a way that benefits her, without knowing a lot more context, I think it's a bit silly to leap to the conclusion that she is "doing it wrong".
It's a chat, she is talking about a subject, and then she can expand on a word, all very naturally, as she is talking with a human.
That's very different than having some subject you're reading about and then having to carry a dictionary which has no context about the subject, and doesn't talk back to you
Perhaps you should consider I have done that, instead of assuming things without knowledge of my experience and only worrying about repeatedly telling other people they are wrong about a subjective experience.
As you keep ignoring important points, including reliability which is paramount for the subject at hand, unfortunately I can no longer assume the conversation is happening in good faith.