Twilight/ˈtwaɪlaɪt/ Definition 1 of 4Pro Tip 1/3Natural Imagery Used to describe moments or scenery with peaceful or serene qualities. The painter captured the twilight's serene beauty. Pro Tip 2/3Not Nighttime Remember, it's not dark like night; there's still light in the sky. Even in the twilight, I could see the path ahead. Pro Tip 3/3Time Specific Refers to the time before nightfall, after sunset. We began our hike in the cool of twilight.