a vivid mental image
the ability to see; the visual faculty
the perceptual experience of seeing
the formation of a mental image of something that is not perceived as real and is not present to the senses
a religious or mystical experience of a supernatural appearance
the time after sunset and before sunrise while it is dark outside
a period of ignorance or backwardness or gloom
the dark part of the diurnal cycle considered a time unit
the period spent sleeping
