There are German dictionaries on the regular shelves on the 3rd floor of Willis Library. Some of them are non-circulating, but some may be checked out.
Call number PF 3625 is a good place to browse for dictionaries in German only. Call number PF 3640 is a good place to browse for German-English dictionaries.
Please note that some German dictionaries are on reserve in the Music Library; ask for these at the Music Library Services Desk on the 4th floor.