Sigh, I understand this was done with good intentions, but a dictionary is one of the last things whose integrity should be compromised. They call the searches for "treachery" an "unfortunate coincidence", but it's really a betrayal of people searching for authoritative definitions. When you're deliberately falsifying the definition of words, you've failed as a dictionary. Instead, the schools giving the test should have sought other solutions: make proctors be more vigilant, collect student cellphones, or even reach out to dictionary websites beforehand so they could omit, rather than modify, the definitions of any words on the test day.