Oxford English Dictionary
Call number: PE 1625 .O87 1989 (Reference Collection)
Random House Dictionary of the English Language
Call number: PE 1625 .R3 1987 c.11 (Reference Desk Dictionary Stand)
Webster's New World College Dictionary
Call number: PE 1628 .W5629 1997 (Reference Desk)
Additional dictionaries (older editions and various versions) can be found in the Reference Collection or in the stacks on the 3rd floor.
Roget's II: The New Thesaurus
Call number: PE 1591 .R715 1995 c.2 (Reference Collection)
Oxford American Dictionary & Thesaurus
Call number: PE 1628 .O95 2009 (Reference Collection)
Additional thesauri (older editions and various versions) can also be found in the Reference Collection as well as in the stacks on the 3rd floor (especially in the PE 1591 call number area).