Collins Dictionaries 
Collins English Dictionary Essential [EPUB ebook] 

The home of trusted English dictionaries and thesauruses for everyday language use.
The perfect dictionary reference for daily use, with 200, 000 words and phrases. Language notes help you choose the right word and the easy-to-use layout allows you to find what you’re looking for quickly.
Specially tailored to meet your needs at home, school, and in the office, offering comprehensive definitions and word tips to provide help with English usage.
Find all the words and definitions you need, with coverage of the language we use every day. With the built-in Search Index, you can use your e-reading app’s search to jump to the desired entry, and the clear layout ensures you can quickly grasp the information you need.