Exoplanet

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A planet which exists outside Earth's solar system.

    "More such announcements will likely come in the months to follow, as the first space observatory dedicated to hunting exoplanets, called COROT, begins full operation and researchers complete their calculations."

  2. 2
    A planet which exists outside Earth's solar system wordnet

Synonyms

All synonyms
exosolar planetexosolar planetextrasolar planetextrasolar planet

Example

More examples

"An exomoon is a moon that orbits around an exoplanet."

Etymology

Constructed from Ancient Greek: exo- (“outside; extrasolar”) + planet.

Related phrases

planetary systemsolar system

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