The merger of dictionaries with historical reference is a relatively recent phenomenon and began in the late 19th century when many general dictionaries added copyright and other disclaimers (hence financial and technical jargon in many dictionaries, although many dictionary publishers decide these things for themselves). Some dictionaries also added extensive references to other dictionaries. At the turn of the 19th-20th centuries, only slang and colloquial dictionaries were taken to include references to other dictionaries. By the 1930s, the growing body of colloquial and slang dictionaries had exploded in size, and some general dictionaries tried to keep up, either by adding footnotes pointing to other entries or by including references before their entries to the dictionary entries from whence the colloquial terms borrowed, often in the same online format. Only one major dictionary, the Funk & Wagnalls, included a note that the definition printed was ``drawn from the Oxford English Dictionary''.
Today, most general dictionaries include explanations -- including references to other dictionaries -- and usually many definitions -- including the term's etymology and all the dictionary entries in which the word appears. d2c66b5586