Perseus has a couple of Latin-English dictionaries[1,2] along with a large number of texts and translations and tools to go between all three; Wiktionary is also often quite decent. Incidentally, the TEI XML files underlying the Perseus website are downloadable[3,4].

[1] https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3atext...

[2] https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3atext...

[3] https://www.perseus.tufts.edu/hopper/opensource/download

[4] https://github.com/PerseusDL