Click the Thesaurus link located above and to the right of the Advanced Search or Command Line Search forms. A new browser window opens, providing a list of the thesauri titles available for your currently selected databases. You can browse/search the ProQuest Thesaurus as well as search using MeSH. These are two different vocabularies produced by two different organizations - so they same concept may represented by different terms.

By adding thesaurus terms to your search, you can broaden or narrow your search, or find related words to further explore your subject of interest. You can also combine terms you find in the thesaurus with your current Advanced or Command Line search.
- Select one or more terms in the thesaurus. The number of selected terms displays and updates automatically in a box at the lower left of the Thesaurus window. Click the View link at any time to see your current list of selected terms.
- If you’ve selected more than one term, specify one of the following operators to join your terms together:
OR (the default)
AND
NOT
- Click Add to search. Your terms are inserted into the search box where your cursor resides and the Thesaurus window closes.
- With your terms added to the search form, use an operator to join the terms to the rest of your search.
Important to know — With a particular thesaurus open in the Thesaurus window, you can click this link in the dark blue bar at the top of the window to open a different thesaurus: Select another thesaurus.
Thesaurus tools
For any term you find in the thesaurus, you might see one or more of the following (or similar) bolded words and phrases:
- Use terms/Use term for — synonymous concepts pointing you to authorized terms.
- Use instead — these terms are the preferred thesaurus terms for your search.
- Narrower terms — more restrictive terms associated with a subset of records.
- Broader terms — less restrictive terms associated with a larger set of records.
- Related terms — similar terms suggested for use with your search.
- Scope notes — Scope notes contain information about the use of a subject heading. The scope note may contain a definition of the subject, the year the subject term came into use, and other important information.