absence

n. failure to appear; state of being away, state of being not present

Absenteeism is a habitual pattern of from a duty or obligation.
See more at Wikipedia.org...

Ab·sence n. See petit mal. absence. Absence attack, absence seizure, petit mal epilepsy Neurology A common form of childhood epilepsy characterized [more]Absence - Community and Resources

Noun
1. the state of being absent; "he was surprised by the absence of any explanation"
(antonym) presence
(hypernym) lack, deficiency, want
(hyponym) nonoccurrence
2. failure to be present
(antonym) presence
(hypernym) nonattendance
(hyponym) cut
(derivation) absent, remove
3. the time interval during which something or somebody is away; "he visited during my absence"
(hypernym) time interval, interval
4. epilepsy characterized by paroxysmal attacks of brief clouding of consciousness (a possible other abnormalities)
(synonym) petit mal epilepsy
(hypernym) epilepsy
(hyponym) complex absence

n. absence, non-attendance