Merriam-Webster’s Collegiate Dictionary (11TH ed.)

Over 215,000 definitions. Easy to use. Thumb index.
This ground-breaking edition merges print, and online formats into one convenient package, providing unmatched accessibility and flexibility. The most up-to-date dictionary available, it features 10,000 new words from all fields of knowledge, 225,000 definitions, more than 700 illustrations, and more than 40,000 usage examples–the most in any desk dictionary. Merriam-Webster