Definition of planetarium
1 : a model or representation of the solar system
2a : an optical device for projecting various celestial images and effectsb : a building or room housing such a projector
Recent Examples of planetarium from the Web
A: Our new planetarium is going to be just as special.
The local planetarium continues its weekly Saturday screening series, with a focus on educational programming.
A then-18-year-old Max Ary was in his first semester at Hutchinson Community College and signed on as a student assistant at the school’s planetarium.
COSI also features a giant-screen theater and a planetarium.
Spend the morning at the South Carolina State Museum, with an observatory featuring a 1926 Alvan Clark refracting telescope, an antique telescope gallery and a state-of-the-art planetarium.
OMSI has the standard fare of OMNIMAX theater, planetarium and traveling shows as well as some really fun permanat installations.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'planetarium'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of planetarium
PLANETARIUM Defined for English Language Learners
Definition of planetarium for English Language Learners
: a building or room in which images of stars, planets, etc., are shown on a high, curved ceiling
PLANETARIUM Defined for Kids
Definition of planetarium for Students
: a building in which there is a device for projecting the images of heavenly bodies on a ceiling shaped like a dome
Seen and Heard
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