Collins COBUILD Advanced Learner's Dictionary

No more guessing games or relying on teacher intuition. Working from a regularly updated corpus of over 4.5 billion words taken from authentic sources, Collins COBUILD products provide learner-friendly resources on how words are really used. (Dr Wayne Trotman, Teacher-Trainer, Izmir Katip Çelebi University, Turkey)

The whole dictionary is a marvel to use. I particularly appreciate the inclusion of word web textboxes which provide detailed definitions for words.(...) The different topics covered in this dictionary make it an excellent reference resource for advanced learners in different fields and professions.
Overall, this dictionary achieves its aims and successfully covers the main aspects of the English language. It is structured in a way that makes it usable in all fields.
(Dr Gift Mehta, the Writing Centre, Durban University of Technology (DUT), RSA IATEFL ESP SIG Journal of English for Academic and Professional Purposes, Issue 45)