Dictionary of the Targumim, Talmud Babli, Yerushalmi, and Midrashic Literature

This dictionary is an absolute must for anyone learning Gemara or any other Aramaic works. It is simply the best Aramaic dictionay around. Not only is every possible definition given, Jastrow brings down numerous examples of the usage of each word, ensuring a firm grasp of each word's nuances. A dictionary like this does not come around often.