thumb index

noun

Definition of thumb index

:a series of usually labeled notches cut in the fore edge of a book (such as a dictionary) to facilitate reference

Examples of thumb index in a Sentence

  1. a dictionary that has a thumb index

First Known Use of thumb index

1903


THUMB INDEX Defined for English Language Learners

thumb index

noun

Definition of thumb index for English Language Learners

  • : a series of small cuts in the edge of the pages in a large book that are labeled and that make it easier to open the book to a particular section


Learn More about thumb index


Seen and Heard

What made you want to look up thumb index? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to praise usually to excess

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!