Alternative spelling of night glass

A spyglass or binoculars with large diameter lenses, used to see objects better in the dark.

(literally) Going away from one's usual residence for an entire night, and returning the next day.

plural of night emission

An ejaculation or orgasm while asleep, often accompanied by an erotic dream.

(idiomatic) Middle of the night.

Something stealthy or that occurs without warning.

It's not very late (at night) and there's plenty of time.

The optic condition nyctalopia, the inability to see clearly in faint light, as at night

All the time; round the clock; unceasingly.