Dictionary.com
Thesaurus.com
Synonyms

divider

American  
[dih-vahy-der] / dɪˈvaɪ dər /

noun

  1. a person or thing that divides.

  2. dividers, a pair of compasses, as used for dividing lines, measuring, etc.

  3. a partition between two areas or dividing one area into two, as a piece of cardboard in a box or a bookcase jutting out from a wall.

  4. room divider.

  5. Mining. bunton.

divider British  
/ dɪˈvaɪdə /

noun

  1. Also called: room divider.  a screen or piece of furniture placed so as to divide a room into separate areas

  2. a person or thing that divides

  3. electronics an electrical circuit with an output that is a well-defined fraction of the given input

    a voltage divider
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of divider

First recorded in 1520–30; divide + -er 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The project, code named Divider, was the 1,054th nuclear weapons test conducted by the US, according to the Los Alamos National Laboratory, which played a central role in helping develop the world's first atomic bomb.

From BBC • Oct. 29, 2025

He is the author of seven books, most recently “The Divider: Trump in the White House, 2017-2021,” with Susan Glasser.

From New York Times • Jul. 16, 2023

The remark came during a meeting with Peter Baker and Susan Glasser, the authors of The Divider: Trump in the White House 2017-2021, around the time of Mr. Trump’s first impeachment.

From Washington Times • Sep. 17, 2022

The Divider: Trump in the White House 2017-2021 will be published in the US next week.

From Salon • Sep. 15, 2022

“There was a sign, Divider of the Sun,” replied Hlatusa, who now considered himself, and they that were with him, already dead.

From The Induna's Wife by Mitford, Bertram

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.