What it does
Oxford Learner's Dictionaries combines English dictionary lookup with academic, collocation, grammar and word-list resources.
Choose the reference that matches the question: a definition, an academic word or a collocation. The grammar area provides another route for usage questions. This separation helps when knowing a word's meaning still leaves uncertainty about how to combine it naturally with other words.
Select English or American English deliberately when spelling and usage matter. The site also advertises an upgrade, so check access to a particular grammar or collocation feature before assigning it to a class.