As a publications editor, I use my dictionary many times a day. I have found this particular dictionary to be the best I've ever used (I wish I had owned this book when I was in grad school). The definitions are clear and crisp, and the synonyms are a nice additional check on meaning and connotation as well as welcome suggestions for alternate words. This book is a must for writers and editors; it truly is the "ultimate language reference." I bought a copy for the office and a copy for my home.