名词

1. 不在；缺席
Someone's absence from a place is the fact that they are not there.

2. 缺乏；不存在
The absence of something from a place is the fact that it is not there or does not exist.

3. see also: leave of absence
conspicuous by one's absence - see conspicuous

1. failure to be present

2. the state of being absent

e.g. he was surprised by the absence of any explanation

3. 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

Synonym: absence seizure

4. the time interval during which something or somebody is away

e.g. he visited during my absence