°An astronomical alignment 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 object onto the other object.
°A seasonal state of plumage in some birds, notably ducks, adopted temporarily after the breeding season and characterised by a dull and scruffy appearance.
verb
°Of astronomical bodies, to cause an eclipse.
°To
overshadow; to be better or more noticeable than.