We found 4 dictionaries that define the word subject headings:

General (2 matching dictionaries)

1. subject headings: Collins English Dictionary
2. subject headings: Wiktionary

Medicine (2 matching dictionaries)

3. Medical Dictionary (No longer online)
4. online medical dictionary (No longer online)

Phrases: Medical Subject Headings, Library of Congress Subject Headings, more... ▸ Words similar to subject headings ▸ Usage examples for subject headings ▸ Idioms related to subject headings ▸ Wikipedia articles (New!) ▸ Words that often appear near subject headings ▸ Rhymes of subject headings ▸ Invented words related to subject headings