Thesaurus Means most nearly

• A. Dictionary of selected terms in a particular book or field
• B. Contains words grouped according to similarity of meaning
• C. Lewd
• D. Fictitious name

Answer: (B)

A thesaurus helps you find words that share similar meanings and shows how they relate to one another. It’s organized so you can see synonyms (and sometimes antonyms) grouped by meaning, which makes it a handy tool for choosing words with close or varying shades of sense. That description fits best with a thesaurus, which is exactly what the option about words being grouped according to similarity of meaning conveys.

The other descriptions point to different kinds of reference works: a dictionary of selected terms in a field describes a specialized glossary rather than a system of related meanings; “lewd” is unrelated to reference tools; and a fictitious name refers to a pseudonym, not a reference resource.