Roget's Thesaurus is a thesaurus of the English language and is considered to be one of the most important works of its kind. The full title is: 'Thesaurus of English Words and Phrases'.
The first version was completed by the lexicographer Peter Mark Roget in 1805 and published in 1852; it contained 15,000 words divided into six classes. While the designation Roget's Thesaurus is legally protected as a brand name in Great Britain to this day, the name is freely used in the USA to designate thesauri, similar to the name Webster (see Merriam-Webster's Collegiate Dictionary ) for dictionaries.
- ↑ Altius Directory: Thesaurus-Day 2011 (English), accessed on April 28, 2011