As you may of heard, a Massachusetts boy looked up the word gay with the Apple dictionary and was very surprised by one of the definitions. It included a derogatory usage that most dictionaries either exclude altogether or note as offensive. This did neither.
What is interesting is Apple’s response that:
“They told me it’s so hard to track the dictionaries they’re getting sources from, and that they were also shocked themselves.”
Apparently it was from the New American Dictionary and later versions of the iOS had updated the definition. This case highlights the importance of not relying on one source as well as determining what the actual source the information comes from which may be harder as apps and computer tools become a source in and of themselves.