Real Dictionary

dusk
The dusk is the dull, shadowy light there is at dusk.
uncountable noun: Dusk is the time just before night when the daylight has almost gone but when it is not completely dark.

dusk in American English
dark in color; dusky; shadowy
the time of evening when it is beginning to get dark; dim part of twilight
to make or become dusky or shadowy

dusk in American English 1
noun: the state or period of partial darkness between day and night; the dark part of twilight

dusk in American English 2
to make or become dusk; darken
adjective: tending to darkness; dark