absence

noun

• A state of being away or withdrawn from a place or from companionship; the period of being away.

  "Absence makes the heart grow fonder."

• Failure to be present where one is expected, wanted, or needed; nonattendance; deficiency.
• Lack; deficiency; nonexistence.

  "He had an absence of enthusiasm."

• Inattention to things present; abstraction (of mind).

  "absence of mind"

• Temporary loss or disruption of consciousness, with sudden onset and recovery, and common in epilepsy.
• Lack of contact between blades.