A thesaurus is a reference book that provides lists of synonyms and antonyms for words. Unlike a dictionary, which defines words, a thesaurus helps users find alternative words with similar meanings or opposite meanings. It is useful for expanding vocabulary, avoiding repetition, and finding the most precise word to express a particular idea. A thesaurus organizes words according to their meanings, often grouping synonyms and antonyms together.

英語での「thesaurus」の定義と意味

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