What does constellation mean?
A constellation is a recognized grouping of stars that forms a distinctive pattern in the night sky, traditionally named after figures from mythology, animals, or everyday objects — Orion the hunter and Ursa Major the great bear being familiar examples. In modern astronomy the word carries a precise technical meaning as well: since the early twentieth century, the entire celestial sphere has been divided into exactly 88 officially bounded regions, each corresponding to a constellation, so every star belongs to one regardless of whether it fits the imagined picture. Beyond stargazing, constellation is frequently used figuratively to describe a rich cluster or assembly of related elements, as in 'a constellation of factors' shaping an outcome or 'a constellation of talents.' This extended use lends the word a slightly literary, elevated tone common in academic and journalistic prose. Rooted in Latin and centuries old, it remains both a practical astronomical term and a graceful way to speak about patterns emerging from scattered parts.
nounA group of stars forming a recognizable pattern in the night sky, traditionally named after a mythological figure, animal, or object; more broadly, a cluster or gathering of related things or people.
- A named group of stars forming a perceived pattern in the night sky, officially one of 88 defined regions of the celestial sphere.
- Figuratively: a group or cluster of related people, things, or ideas considered together.
- A set of circumstances or factors that combine to produce a particular situation.
"Orion is one of the most easily recognized constellations in the winter sky."
"Sailors have navigated by the constellation Ursa Minor for centuries."
"A constellation of economic pressures forced the company to restructure."
Standard regular plural; used for multiple star groups or multiple figurative clusters.
"Ancient astronomers catalogued dozens of constellations across both hemispheres."
The International Astronomical Union recognizes exactly 88 constellations — and they don't just contain stars, they carve the entire sky into official territories with real boundaries.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of constellation
Constellation comes from Late Latin 'constellatio,' meaning 'set with stars,' derived from 'constellatus,' the past participle of 'constellare' ('to set with stars'), itself formed from the prefix 'com-' ('together') and 'stella' ('star'). The word entered English via Old French in the Middle Ages, with written attestation from the late medieval period onward. It shares its Latin root 'stella' with words such as stellar, interstellar, and sidereal (the latter via the related Latin noun 'sidus,' meaning star or constellation).
Related word forms
How constellation is actually used
In astronomy, 'constellation' has a precise technical meaning: one of 88 officially designated regions of the celestial sphere, not merely a star pattern. The figurative sense ('a constellation of factors') is common in formal and academic writing. Plural: constellations.
Easily confused with constellation
An asterism is a smaller, unofficial star pattern (like the Big Dipper) within or across official constellations, which are formally defined regions of the sky.