All 4 Uses

twilight
in
The Notebook
(Edited)

They held each other tightly, making it real, both of them letting the fourteen years of separation dissolve in the deepening twilight.

twilight = the time of day between daylight and darkness
He saw a family of turtles resting on a partially submerged log and watched as a heron broke for flight, skimming just above the water before vanishing into the silver twilight that preceded sunrise.
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twilight = light from the sky between daylight and darkness
I have no time for worry in this twilight of my life.
*

twilight = time of decline towards the end
In time, silver twilight is the only remainder of the day, and still we talk of the poetry.

twilight = light like that from the time of day between daylight and darkness (in this case just after sunset, but in other usage, it could be just before sunrise)

Definitions:

(1) (twilight as in: pink clouds in a twilight sky)
the time of day between daylight and darkness (just after sunset or just before sunrise); or the light from the sky at that time
(2) (twilight as in: the twilight of her career)
a condition of decline following successes
(3) (meaning too rare to warrant focus)
Much more rarely, twilight can refer to