I absolutely hate this so much. I type "define" because I'm looking for a dictionary definition. Dictionary authors provide a careful consideration to the fluidity of language, and they write dictionaries in the format they do for a reason. The AI overview comes from web retrieval, which sources definitions from random idiots on the internet. These random idiots will just repeat what I already thought the word meant, offer up a common misconception or etymological fallacy, or give the 'annoying grammar nazi' take.