• (astronomy) An alignment of astronomical objects in which a planetary object (for example, the Moon) comes between the Sun and another planetary object (for example, the Earth), resulting in a shadow being cast by the middle planetary object onto the other planetary object.
  • Obscurity, decline, downfall
  • A seasonal state of plumage in some birds, notably ducks, adopted temporarily after the breeding season and characterised by a dull and scruffy appearance.


  • (transitive) Of astronomical bodies, to cause an eclipse.

    "The Moon eclipsed the Sun."

  • (Irish grammar) To undergo eclipsis.
  • (transitive) To overshadow; to be better or more noticeable than.

    "The student’s skills soon eclipsed those of his teacher."

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