plane geometry

noun

: a branch of elementary geometry that deals with plane figures

Example Sentences

Recent Examples on the Web All this talk of plane geometry is hard to visualize, so L’Engle’s 1962 novel comes complete with a diagram. refinery29.com, 7 Mar. 2018

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

Word History

First Known Use

1747, in the meaning defined above

Time Traveler
The first known use of plane geometry was in 1747

Dictionary Entries Near plane geometry

Cite this Entry

“Plane geometry.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/plane%20geometry. Accessed 7 Feb. 2023.

More from Merriam-Webster on plane geometry

Love words? Need even more definitions?

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


The Great British Vocabulary Quiz

  • union jack speech bubble
  • Named after Sir Robert Peel, what are British police called?
Spell It

Hear a word and type it out. How many can you get right?

TAKE THE QUIZ
Solve today's spelling word game by finding as many words as you can with using just 7 letters. Longer words score more points.

Can you make 12 words with 7 letters?

PLAY