thumb index


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

a dictionary that has a thumb index

First Known Use of thumb index

1903, in the meaning defined above

Keep scrolling for more

Learn More about thumb index

Statistics for thumb index

Look-up Popularity

Time Traveler for thumb index

The first known use of thumb index was in 1903

See more words from the same year

Keep scrolling for more

More Definitions for thumb index

thumb index


English Language Learners Definition of thumb index

: 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

More from Merriam-Webster on thumb index

Rhyming Dictionary: Words that rhyme with thumb index

Comments on thumb index

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


a period when something is suspended

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Dictionary Devil

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

Love words? Need even more definitions?

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