1) Absence 2) Habitual absence from work 3) Legal terminology 4) Truancy 
Absenteeism is a habitual pattern of absence from a duty or obligation. Traditionally, absenteeism has been viewed as an indicator of poor individual performance, as well as a breach of an implicit contract between employee and employer; it was seen as a management problem, and framed in economic or quasi-economic terms. More recent scholarship se...
• (n.) The state or practice of an absentee; esp. the practice of absenting one`s self from the country or district where one`s estate is situated.
Absence from work without any legitimate reason. Absenteeism often involves employees sporadically taking a few days off work, citing ill health as the reason. The small number of days means no...
Chronic absence from work or other duty. ... (12 Dec 1998) ... 
Absenteeism consists of days not at work, being late and taking excessively long breaks :: Guinness (5th Edition)
Failure of worker to report to work when scheduled.
Referred to as the habitual failure of employees to report for work when they are scheduled to work.
(Learning Modules / Psychology / Stress management) Frequent and persistent non-attendance at work.(Learning Modules / Psychology / Stress) Frequent and persistent non-attendance at work.
Ab`sen·tee'ism noun The state or practice of an absentee; esp. the practice of absenting one's self from the country or district where one's estate is situated. 
Absenteeism: The frequent absence from work or other duty without good reason. See also: Presenteeism.
[n] - habitual absence from work
noun habitual absence from work
frequent or habitual absence from work, school, etc.: rising absenteeism in the industry. · the practice of being an absentee landlord.