Recent updates to the OED
The OED is updated four times a year, every March, June, September, and December.
The material added to the dictionary includes revised versions of existing entries (which replace the older versions), and new words and senses both within the alphabetical sequence of revised entries and also across the whole A to Z range.
Published quarterly since 2000, the updates make up the Third Edition of the OED.
March 2013 update
The latest range of revised and updated OED entries focuses on revision of blue, covering 614 headwords, compounds, and other expressions. New words and meanings include boccia, podium, and whip-smart.
Alongside these, we have major clusters around the ranges of: audience and audio-; Caribbean; credit and Creole; friend; gang and gangster; serial and serious, smart, and the volcano words.
You can read more about the revisions and new words in the March 2013 update in this article by the Chief Editor of the OED, John Simpson.
See a full list of the new words and new subentries added in this update.
The OED publishes four updates a year. The next update will be added to the dictionary in June 2013.
The previous updates page gives a full list of updates from March 2000 to September 2012.