noun ·Uncommon ·Advanced level

Definitions

Noun

1. 1
   A display museum in which images of stars and other astronomical phenomena are projected onto a domed ceiling.
2. 2
   an apparatus or model for representing the solar systems wordnet
3. 3
   An orrery.
4. 4
   an optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome wordnet
5. 5
   a building housing an instrument for projecting the positions of the planets onto a domed ceiling wordnet

Synonyms

All synonyms

astronomical observatoryastronomical telescopecassegrainian telescopecoelostatcoronagraphcoronograph

Example

More examples

"They kissed inside the planetarium."

Etymology

Borrowed from New Latin planētārium. Equivalent to planet + -arium.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.