blood moon
noun
variants
or Blood Moon
plural blood moons or Blood Moons
: a full moon that coincides with a full lunar eclipse and that has an unusually reddish appearance
Note: The red color of a blood moon is caused by the diffusion of the sun's light into the shadow cast by the Earth.
And when it [the full moon] is eclipsed by the shadow of the Earth, it is called a blood moon as it turns a crimson color.—
IFLSCIENCE.com (London)
IFLSCIENCE.com (London)Through the little windows over the deep double kitchen sink, I saw a big sliver of blood moon sinking below the distant mountains.—David Erik Nelson
David Erik Nelson
also
: a full lunar eclipse during which a blood moon occurs
A blood moon is the unscientific name for a total lunar eclipse, which is when Earth passes in between the sun and the moon, casting a shadow over the moon as sunlight is blocked. —BreakingNews.ie
BreakingNews.ie Examples of blood moon in a Sentence
Recent Examples on the Web
The result: The darkened moon glowed a distinct orange-red—a phenomenon popularly called a blood moon.
—Jeffrey Kluger, TIME, 14 Mar. 2025
Here's what's in store for your zodiac sign with the arrival of March's full moon on March 13, which will double as a total lunar eclipse and a blood moon
Comments
'Tis the eclipse season!
—Skyler Caruso, People.com, 8 Mar. 2025
The full moon in March will also be a blood moon, appearing as a total lunar eclipse becomes visible across Northern America.
—Hannah Poukish, Sacramento Bee, 7 Mar. 2025
During this lunar phase, the moon may appear reddish in tone due to the sunlight in the earth’s atmosphere—a phenomenon also known as a blood moon.
—Danijela Pilic, Glamour, 13 Mar. 2025
Tonight there is a lunar eclipse during a full moon, something called a blood moon.
—Bethy Squires, Vulture, 14 Mar. 2025
Key moments, schedule, when to see 'blood moon' Want to snap the perfect photo of tonight's lunar eclipse?
—Mary Walrath-Holdridge, USA TODAY, 14 Mar. 2025
In the meantime, here are some must-see photos of the blood moon lunar eclipse from around the world.
—Valerie Mesa, People.com, 14 Mar. 2025
Amateur astronomers can get the best views of the blood moon by watching the eclipse in a dark environment far away from city lights, according to NASA.
—Hannah Poukish, Sacramento Bee, 13 Mar. 2025
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Jeffrey Kluger, TIME, 14 Mar. 2025
Here's what's in store for your zodiac sign with the arrival of March's full moon on March 13, which will double as a total lunar eclipse and a blood moon
Comments
'Tis the eclipse season!
—Skyler Caruso, People.com, 8 Mar. 2025
The full moon in March will also be a blood moon, appearing as a total lunar eclipse becomes visible across Northern America.
—Hannah Poukish, Sacramento Bee, 7 Mar. 2025
During this lunar phase, the moon may appear reddish in tone due to the sunlight in the earth’s atmosphere—a phenomenon also known as a blood moon.
—Danijela Pilic, Glamour, 13 Mar. 2025
Tonight there is a lunar eclipse during a full moon, something called a blood moon.
—Bethy Squires, Vulture, 14 Mar. 2025
Key moments, schedule, when to see 'blood moon' Want to snap the perfect photo of tonight's lunar eclipse?
—Mary Walrath-Holdridge, USA TODAY, 14 Mar. 2025
In the meantime, here are some must-see photos of the blood moon lunar eclipse from around the world.
—Valerie Mesa, People.com, 14 Mar. 2025
Amateur astronomers can get the best views of the blood moon by watching the eclipse in a dark environment far away from city lights, according to NASA.
—Hannah Poukish, Sacramento Bee, 13 Mar. 2025
Cite this Entry
“Blood moon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blood%20moon. Accessed 28 May. 2025.
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