absence -- (the state of being absent; "he was surprised by the absence of any explanation")
absence -- (failure to be present)
absence -- (the time interval during which something or somebody is away; "he visited during my absence")
absence, absence seizure -- (the occurrence of an abrupt, transient loss or impairment of consciousness (which is not subsequently remembered), sometimes with light twitching, fluttering eyelids, etc.; common in petit mal epilepsy)