Oh man, finally, this is something I have wanted for a long time. Whenever someone from Google asked for feedback, I always told them it should attempt to correct spelling when using [define:], so you don't have to delete the define:, search again, click the corrected result, and add the define: back. I had heard this was highly requested from within Google as well. Today I mistyped a word while looking for the definition; it loaded before I could hit escape and Google offered the correct spelling! Yay!