mon·​oc·​u·​lar | \ mä-ˈnä-kyə-lər How to pronounce monocular (audio) , mə- \

Definition of monocular

 (Entry 1 of 2)

1 : of, involving, or affecting a single eye
2 : suitable for use with only one eye



Definition of monocular (Entry 2 of 2)

: a monocular device

Keep scrolling for more

Other Words from monocular


monocularly adverb

Examples of monocular in a Sentence

Recent Examples on the Web: Adjective Agents use a monocular scope to make note of faraway clues and read micro text with a magnifying glass. Allison Bagley, Houston Chronicle, "Calling All Secret Agents to the Children’s Museum of Houston," 6 June 2018 The 2018 Acura TLX also includes AcuraWatch, a system that uses millimeter wave radar and monocular camera sensing technology to detect other vehicles as well as lane markings to help you out on the road. Terry Troy,, "New Acura TLX includes NSX design cues," 20 May 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'monocular.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of monocular


1640, in the meaning defined at sense 1


1936, in the meaning defined above

History and Etymology for monocular


Late Latin monoculus having one eye

Keep scrolling for more

Learn More about monocular

Time Traveler for monocular

Time Traveler

The first known use of monocular was in 1640

See more words from the same year

Statistics for monocular

Cite this Entry

“Monocular.” Dictionary, Merriam-Webster, Accessed 13 Jul. 2020.

Keep scrolling for more

More Definitions for monocular


mon·​oc·​u·​lar | \ mä-ˈnäk-yə-lər, mə- How to pronounce monocular (audio) \

Medical Definition of monocular

1 : of, involving, or affecting a single eye monocular vision
2 : suitable for use with only one eye a monocular microscope

Other Words from monocular

monocularly adverb

More from Merriam-Webster on monocular

Rhyming Dictionary: Words that rhyme with monocular Encyclopedia article about monocular

Comments on monocular

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


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a closeup of a sunflower
  • Which of the following words means “of or relating to summer”?
Spell It

Can you spell these 10 commonly misspelled words?


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!