WORDREFERENCE (English-Spanish)
THE OXFORD POCKET DICTIONARY (English-Spanish)
LINGUEE – Translations
REVERSO – Translations
THE FREE DICTIONARY – Definitions in English with the possibility to be translated into different languages
OXFORD ADVANCED LEARNER’S DICTIONARY – a very complete online dictionary with definitions, pronunciations, and pictures.
HOW U SAY – only pronunciation
INTERESTING WEBSITES & BLOGS worthy to check out
1. El blog para preparar el “writing” de la Escuela Oficial de Idiomas