Oxford English Dictionary
Work began on the dictionary in 1857, but it was not until 1884 that it began to be published in parts, under the name of A New English Dictionary on historical principles; founded mainly on the materials collected by the Philological Society. In 1895, the title The Oxford English Dictionary (OED) was first used unofficially on the covers of the series, and in 1928 the full dictionary was republished in ten bound volumes. In 1933, The Oxford English Dictionary was reprinted as twelve volumes with a one-volume supplement. More supplements came over the years until 1989, when the second edition was published. Since 2000, a third edition of the dictionary has been underway, approximately a third of which is now complete.