Knowing a word's definition is useless if you don't know how to use it. A superior PDF provides a sentence for each word. For example:

When you search for and download a you are typically accessing a curated list derived from large linguistic corpora (databases of real-world language usage). These lists are not random; they are scientifically compiled based on frequency.

When combined with its partner series, 1200 Key English Words , learners build a solid foundation of 4,500 practical words that account for roughly 80–90% of most written and spoken English. Key Features of the Vocabulary List