The most useful one-volume dictionary of the ancient world in English has for many years been the Oxford Classical Dictionary, whose first edition appeared in 1949, followed by the second in 1970. The new third edition, though, has been very largely rewritten, being 20 percent larger than its predecessor, and having more than eight hundred new entries. It is all written in the English language, but its 364 contributors are drawn not only from English-speaking countries, but from all countries where classical antiquity is studied. What the editors in their introduction call “a certain top-heaviness in favor of the purely literary aspects” of ancient culture has been effectively corrected; the new edition deals not only with literature but with archaeology, art, history, law, religion, philosophy, linguistics, science, and mathematics. It gives extended coverage to regions beyond the core areas of Greece and Italy, and to cultures which interacted with those of Greece and Rome. Eighteen “Area Advisors” are named as having been responsible for different aspects of ancient culture; for the most part these are noted experts. Much of the old dictionary has been preserved, but it has often been expanded and has been carefully brought up to date, with the addition of much valuable bibliography. [Note: The review refers to the 3rd edition, published in 1996.]