This dictionary investigates the practical application of contemporary English by providing a corpus-based reference tool designed specifically for non-native speakers. The authors, drawing on the extensive linguistic resources of the Collins Cobuild project, utilize a massive database of real-world usage to prioritize the most frequent and functional vocabulary. By moving away from traditional, abstract definitions, the text provides a framework that emphasizes how English is actually written and spoken in modern contexts.

The work is regarded as a foundational resource for English language learners due to its departure from traditional lexicographical jargon in favor of natural, contextualized usage. Its reliance on empirical corpus data makes it a standard reference for students seeking to understand the nuances of modern English communication.