What one of the things a dictionary contains that thesaurus

A dictionary contains definitions of words, which a thesaurus does not.

Here's a breakdown:

* Dictionary: Provides the meaning, pronunciation, and etymology (origin) of words.

* Thesaurus: Provides synonyms (words with similar meanings) and sometimes antonyms (words with opposite meanings) for a given word.

While both resources are helpful for understanding language, they serve different purposes.