Absence (noun)

1. The state of not being present.
2. The failure to attend an event or meeting.
3. The state of being away from a place or person.
4. The state of being away from one's job or duties.

Origin:

Middle english: from old french, from latin absentia, from absens "being away", present participle of abesse "be away".

Examples:

1. The class started without him because of his absence.
2. His absence was noticed at the meeting.
3. She was in a state of absence.
4. His absence from work was due to illness.
5. The absence of the sun made the day gloomy.