Reference.com is an online encyclopedia, thesaurus, and dictionary. The site also provides machine translation and web search.Reference.com was launched by InReference, Inc in February, 1997. The site was later acquired by Lexico Publishing Group, LLC. In 2005, Lexico announced that Reference.com would begin offering searches of Wikipedia content. In mid-2007, the site typically ranked in the mid-200s among the most popular websites on the Internet.