We currently have an institution-wide trial of the Oxford English Dictionary(OED) online.

The OED Online is the most authoritative and comprehensive record of the English language in the world, tracing the evolution and use of more than 600,000 words through over 3 million quotations.

• Trial period: December 16, 2014 - Febrary 28, 2015
• Website: http://www.oed.com/
• User Guide(PDF)