Absenteeism is when an employee is continually absent from work. This does not count days off for annual leave or sick leave. Vacation time is offered if requested in advance, and sick days can be used in an emergency. There should be no other reason for staff not to show up unless it falls under one of those two categories.
An employee not showing up to work is a serious issue for employers. Conduct of this nature can affect the entire team and lead to the loss of morale and lower productivity. Any absenteeism issues should be addressed immediately with the staff member in question.