The Cambridge Dictionary of Philosophy by Robert Audi
Contains comprehensive entries on major philosophers (e.g. Aristotle, Henry More) including pre-eminent contemporary philosophers (e.g. Nussbaum). Extensively covers rapidly developing fields such as the philosophy of mind and applied ethics. International in scope with entries on non-Western and non-European philosophy, including African, Arabic, Islamic, Japanese, Jewish, Korean and Latin-American philosophy and broad coverage of Continental philosophy.