I have a few Latin to English and English to Latin dictionaries, but I was wondering whether there is such a thing as a Latin to Latin dictionary, and, if so, where one might be found. There are, of course, such things for English, French, and almost every other modern language (think OED and Le Petit Robert). I have not, however, come across such a thing for a classical language such as Latin.
I can see little practical use in translation from Latin to English or English to Latin, but it may be interesting in gaining a fuller understanding of a word and useful in the context of attempting to read and understand with fluency without having to rely on the vernacular.
Any help or guidance would be appreciated, gratias ago.