Definition of thumb index in US English:
thumb index
nounTHəm ˈinˌdeksθəm ˈɪnˌdɛks
A set of lettered or marked grooves cut down the side of a book, especially a diary or dictionary, for easy reference.
Example sentencesExamples
- Kent's volume is a good size for students starting out in homeopathy and has a thumb index for added ease of use.
- The Indexed Edition features 21 thumb indexes and comes in a gold-embossed, two-piece blue box.
- One of the key design elements of the brochure is the series of thumb indexes along the face of the book.
- Color-coded main topic sections serve as thumb indexes and are coordinated to match the table of contents, making the sections very quick and easy to find.
- These known stepped or thumb indexes are easily damaged by being folded or worn-out according to long time use and this spoils the beauty of the pocketbook and the atlas.