Cassiopeia

noun

Cas·​si·​o·​pe·​ia ˌka-sē-ə-ˈpē-ə How to pronounce Cassiopeia (audio)
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
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.
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

Word History

Etymology

Latin, from Greek Kassiopeia

First Known Use

1596, in the meaning defined at sense 1

Time Traveler
The first known use of Cassiopeia was in 1596

Rhymes for Cassiopeia

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Browse Nearby Words

Cassiope
Cassiopeia
Cassiopeian
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Cite this Entry

“Cassiopeia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Cassiopeia. Accessed 26 Apr. 2025.

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Kids Definition

Cassiopeia

noun
Cas·​si·​o·​pe·​ia ˌkas-ē-ə-ˈpē-(y)ə How to pronounce Cassiopeia (audio)
: a northern group of stars between Andromeda and Cepheus

More from Merriam-Webster on Cassiopeia

Britannica.com: Encyclopedia article about Cassiopeia

Last Updated: - Updated example sentences
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