Contains the complete text of the OED's 20-volume Second Edition and 3-volume Additions Series plus Historical Thesaurus of the OED. Also includes draft material from the current OED project, representing the latest progress towards a completely revised and updated Third Edition. The OED online can be used to perform simple searches for word definitions, or for full-text searching of all OED's definitions, etymologies and quotations through the Search function. Updated quarterly.