1
: the Roman god of war compare ares
2
: the planet fourth in order from the sun and conspicuous for its red color see Planets Table

Examples of Mars in a Sentence

Recent Examples on the Web
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His 2023 novel Mixtape Hyperborea — a guys-being-dudes novel about a group of high school seniors who cruise the mall, smoke weed, lie about getting laid and call each other gay — was positively reviewed by Mars Review of Books. John McDermott, Rolling Stone, 6 July 2025 The largest rock from Mars ever found on Earth is going up for auction at Sotheby’s on July 16 The meteorite, known as NWA 16788, weighs about 54 lbs. Toria Sheffield, People.com, 6 July 2025 The mission’s first phase is already underway, with NASA's Perseverance rover exploring the surface of Mars. New Atlas, 6 July 2025 Meet The ‘Rival Of Mars’ Antares is a red supergiant star — a dying star. Jamie Carter, Forbes.com, 6 July 2025 See All Example Sentences for Mars

Word History

Etymology

Latin Mart-, Mars

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of Mars was in the 14th century

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Cite this Entry

“Mars.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Mars. Accessed 11 Jul. 2025.

Kids Definition

Mars

noun
: the planet fourth in order from the sun see planet

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