Webster's Revised Unabridged Dictionary · 1913

Overshadow

Overshadow , transitive verb

[Compare Overshade. ]

1.
To throw a shadow, or shade, over; to darken; to obscure.
There was a cloud that overshadowed them. — Mark ix. 7
2.
To cover with a superior influence; to be viewed as more important than. — Milton
3.
To cause to be sad or disappointing; to cast a sad shadow on; as, an accidental death overshadowed the joy of the festival.