Update: Here’s a Complete List of the New Words (With Definitions)
From an Article Appearing in The Telegraph:
Gabby Fletcher, a spokeswoman for Oxford Dictionaries Online, said: “The rapid development of technology creates multiple new products, services, and functionalities, which all need new terms to describe them.
“We are also seeing the very fast circulation of new vocabulary on a global basis, with the expansion of social media.
See Also: How do you decide what to include in a dictionary? (via Oxford Dictionaries)