Merriam-Webster's Collegiate Dictionary: Thumb-Indexed

This groundbreaking 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