I want to know the answer to the following question:
What year did the International Astronomical Union define the word planet?
All the background I'm provided with is that "In 2006, the International Astronomical Union defined the word "planet" for the first time, reclassifying Pluto as a "dwarf planet" and making Neptune once again the outermost known planet in the Solar System.". Is that enough to answer the question?
Answer: yes