I'm not an English major, but far too often the word I'm looking for is not in this dictionary. I was watching TV with my son, and the word, "grifter" came up. My son asked what it meant. I tried to provide him my understanding of its meaning. Then, we grabbed this dictionary to confirm my understanding. "Grifter" is not in the dictionary. I would estimate that at least a third of the words that I look up, are not in this dictionary.