I suggest you the OXFORD BEGINNER SPANISH DICTIONARY. Take this site in account, too: http: //www.wordreference.com/es/ I hope it helps. :)

Try this:http://english-spanish-dictionary.org/

i suggest this dictionary: http://www.wordreference.com/ptes/ 4 learn spanish: read el pais or visit http://www.studyspanish.com/

http://buscon.rae.es/draeI/ just read wikipedia in spanish, it's really useful