half plane

noun

: the part of a plane on one side of an indefinitely extended straight line drawn in the plane

Word History

First Known Use

1848, in the meaning defined above

Time Traveler
The first known use of half plane was in 1848

Dictionary Entries Near half plane

half-pitch

half plane

half price

See More Nearby Entries 

Cite this Entry

“Half plane.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/half%20plane. Accessed 6 Jun. 2024.

Copy Citation

Share

Kids Definition

half plane

noun
: the part of a plane on one side of an indefinitely long straight line drawn in the plane
Love words? Need even more definitions?

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

Popular in Grammar & Usage

See All

What's the difference between 'fascism' and 'socialism'?

More Commonly Misspelled Words

Commonly Misspelled Words

How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-)

Absent Letters That Are Heard Anyway
See All

Popular in Wordplay

See All

8 Words for Lesser-Known Musical Instruments

The Words of the Week - May 31

9 Superb Owl Words

10 Words for Lesser-Known Games and Sports

Etymologies for Every Day of the Week
See All

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Word Game Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
Missing Letter A crossword with a twist
winning words from the national spelling bee logo
Spelling Bee Quiz Can you outdo past winners of the National Spelli...