Abstinence from sleep, whether at a time when sleep is customary or not; the act of keeping awake, or the state of being awake, or the state of being awake; sleeplessness; wakefulness; watch.
- A watch kept during normal sleeping hours.
- The act or a period of observing; surveillance.
- The eve of a religious festival observed by staying awake as a devotional exercise.
- Ritual devotions observed on the eve of a holy day. Often used in the plural.