Cassiopeia
noun
Cas·si·o·pe·ia
ˌka-sē-ə-ˈpē-ə 
1
: the wife of King Cepheus who gives birth to Andromeda and is later changed into a constellation
2
[Latin (genitive Cassiopeiae), from Greek Kassiopeia]
: a northern constellation between Andromeda and Cepheus
Examples of Cassiopeia in a Sentence
Recent Examples on the Web
Instead, Mu Cassiopeia A is a simple field star --- a yellow dwarf of the same spectral type as our own sun, but one that clocks in at an astonishing 12.7 billion years old.
—
Bruce Dorminey, Forbes.com, 14 Apr. 2025
Luna Sulien Venus Nyx Cosmo Atom Rigel Stella Nebula
Apollo
Vega
Andromeda
Celestia
Sol
Lyra
Comet
Artemis
Sirius
Cassiopeia
Galaxy
Cosima
Skye
More Futuristic Baby Names Inspired by Nature
Nature is majestic and wild—a constant source of inspiration for adventurous, courageous spirits.
—Fiona Tapp, Parents, 10 Apr. 2025
This image features a deep field view of the Cassiopeia constellation immersed in the glow of ionized hydrogen gas, where the two small planetary nebulas can be found, Abell 6 and the larger HFG1.
—Miguel Claro, Space.com, 22 Mar. 2025
Stargazer Cassiopeia, Terlingua, Texas Stargazer Cassiopeia was tailor-made for night-sky enthusiasts, with space-view skylights that make sleep near impossible.
—Stephanie Vermillion, Outside Online, 4 Mar. 2025
The collective supernova aftermath is famously called Cassiopeia A.
—Sharmila Kuthunur, Space.com, 16 Jan. 2025
The constellation Cepheus is not nearly as bright as Cassiopeia and looks nothing like a king.
—Mike Lynch, Twin Cities, 9 Feb. 2025
Similar-sounding names: Cassidy, Cassiopeia, Callista, Alessia, Carissa, Celestia, Catriona, Cecilia, Carys, Clarissa
12.
—Ryan Brennan, Fort Worth Star-Telegram, 30 Jan. 2025
From the blues and golds of the breathtaking Southern Ring Nebula to the pinks, oranges and purples of the Cassiopeia A supernova remnant, James Webb Space Telescope (JWST) images render the universe in brilliant color.
—Rebecca Sohn, Space.com, 16 Jan. 2025
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Bruce Dorminey, Forbes.com, 14 Apr. 2025
Luna Sulien Venus Nyx Cosmo Atom Rigel Stella Nebula
Apollo
Vega
Andromeda
Celestia
Sol
Lyra
Comet
Artemis
Sirius
Cassiopeia
Galaxy
Cosima
Skye
More Futuristic Baby Names Inspired by Nature
Nature is majestic and wild—a constant source of inspiration for adventurous, courageous spirits.
—Fiona Tapp, Parents, 10 Apr. 2025
This image features a deep field view of the Cassiopeia constellation immersed in the glow of ionized hydrogen gas, where the two small planetary nebulas can be found, Abell 6 and the larger HFG1.
—Miguel Claro, Space.com, 22 Mar. 2025
Stargazer Cassiopeia, Terlingua, Texas Stargazer Cassiopeia was tailor-made for night-sky enthusiasts, with space-view skylights that make sleep near impossible.
—Stephanie Vermillion, Outside Online, 4 Mar. 2025
The collective supernova aftermath is famously called Cassiopeia A.
—Sharmila Kuthunur, Space.com, 16 Jan. 2025
The constellation Cepheus is not nearly as bright as Cassiopeia and looks nothing like a king.
—Mike Lynch, Twin Cities, 9 Feb. 2025
Similar-sounding names: Cassidy, Cassiopeia, Callista, Alessia, Carissa, Celestia, Catriona, Cecilia, Carys, Clarissa
12.
—Ryan Brennan, Fort Worth Star-Telegram, 30 Jan. 2025
From the blues and golds of the breathtaking Southern Ring Nebula to the pinks, oranges and purples of the Cassiopeia A supernova remnant, James Webb Space Telescope (JWST) images render the universe in brilliant color.
—Rebecca Sohn, Space.com, 16 Jan. 2025
Cite this Entry
“Cassiopeia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Cassiopeia. Accessed 25 Apr. 2025.
Copy CitationKids Definition
Cassiopeia
noun
Cas·si·o·pe·ia
ˌkas-ē-ə-ˈpē-(y)ə
: a northern group of stars between Andromeda and Cepheus
Love words? Need even more definitions?
Merriam-Webster unabridged
Share