Oxford advanced learner's dictionary of current English

This learner's dictionary teaches users how to use English. It contains 80.000 references, 10.500 idioms and phrasal verbs, 90.000 examples of language in use, 1700 words illustrated and 4200 synonyms and antonyms. Definitions are written using a carefully chosen defining vocabulary of 3000 words. This interactive edition comes complete with a "Genie" CD-ROM which explains words even when users are online.