The Oxford 3000 is a list of the 3000 most important words in the English language, compiled by Oxford University Press. These words were selected based on their frequency of use in written and spoken English, as well as their importance for communication in different contexts.

The Oxford 3000 list is widely used in English language teaching and learning, as it provides a core vocabulary that students can focus on mastering before moving on to more advanced vocabulary. Learning these high-frequency words can greatly improve students' ability to communicate in English and understand English texts.