A thesaurus (pl.: thesauri or thesauruses), sometimes called a synonym dictionary or dictionary of synonyms, is a reference work which arranges words by their meanings (or in simpler terms, a book …

A thesaurus is composed by at least three elements: 1-a list of words (or terms), 2-the relationship amongst the words (or terms), indicated by their hierarchical relative position (e.g. parent/broader …

Synonym list in cuneiform on a clay tablet, Neo-Assyrian period [1] A synonym is a word, morpheme, or phrase that means precisely or nearly the same as another word, morpheme, or phrase in a given …

Roget's Thesaurus is a widely used English-language thesaurus, created in 1805 by Peter Mark Roget (1779–1869), British physician, natural theologian and lexicographer.

In library and information science, controlled vocabulary is a carefully selected list of words and phrases, which are used to tag units of information (document or work) so that they may be more easily …

The Historical Thesaurus of English (HTE) is the largest thesaurus in the world. It is called a historical thesaurus as it arranges the whole vocabulary of English, from the earliest written records in Old …

WordNet is a lexical database of semantic relations between words that links words into semantic relations including synonyms, hyponyms, and meronyms. The synonyms are grouped into synsets …

The thesaurus is integrated into the dictionary. Under each definition, various related words are shown, including: Synonyms Antonyms Hyponyms (' play ' lists several subtypes of play, including ' passion …

The site comprises a selection of articles from open-access journals that can in many cases also be found on a journal's own website. It is a sister site to The Free Dictionary and usage examples in the …

OpenThesaurus is a multilingual thesaurus project built in open collaboration by volunteers. Its data is freely available as open content. It is known for its usage in the applications OpenOffice.org, …