Frequent commenter Paul Ogden has created a Wikipedia article for what sounds like a wonderful thing, the Historical Dictionary Project for Hebrew. That second link is from the official site of the Academy of the Hebrew Language, which sponsors the project; they say:
The overarching goal of the HDP is to present the history and development of the Hebrew lexicon, from the earliest occurrences of words down through their most recent documentation. Whereas similar historical dictionary projects in Europe merely brought citations from texts of recent centuries, the Academy’s HDP is based upon Hebrew texts up until 1100 CE, and large selections of literature from the periods thereafter until the founding of the State of Israel. It was decided to begin with texts from the post-biblical period, and thus the database reflects more than 2000 years of Hebrew writing.
The Wikipedia article adds that “The complete lexical archive will contain at least 25 million quotations.” In short, a Hebrew OED. Every language needs one!