The Oxford Spanish Dictionary

Rating:
Summary: A Masterpiece Una Obra Maestra
Review: Without a doubt the most complete dictionary of its kind. It truly opens the door to conceptual understanding of expressions, slang and idioms that would otherwise remain misunderstood. It is an advanced dictionary. College level.

I am not giving it the 5 stars because the dictionary was poorly put together, tends to come apart rather easily and this is the Hardcover edition (2003).