1. (n.) That part of the natural day when the sun is beneath the horizon, or the time from sunset to sunrise; esp., the time between dusk and dawn, when there is no light of the sun, but only moonlight, starlight, or artificial light.

2. (n.) Darkness; obscurity; concealment.

3. (n.) Intellectual and moral darkness; ignorance.

4. (n.) A state of affliction; adversity; as, a dreary night of sorrow.

5. (n.) The period after the close of life; death.

6. (n.) A lifeless or unenlivened period, as when nature seems to sleep.