Synonyms: blackening, darkening
Definition: changing to a darker color
Similar words: change of color
Definition: an act that changes the light that something reflects
Synonyms: darkening
Definition: becoming dark or darker as from waning light or clouding over
Usage: the darkening sky
Similar words: dark
Definition: devoid of or deficient in light or brightness; shadowed or black
Usage: sitting in a dark corner; a dark day; dark shadows; dark as the inside of a black cat