Tag line / #2893

What is the meaning of word Tag line o tagline?

I founded meaning:
'tag line = the point of a joke or humorous story'

### ../db/class_company.inc.php   ###
'Tag line|form field for company'=>'',  # line 45

### ../db/class_person.inc.php   ###
'Optional: Additional tagline (eg. multimedia concepts)'=>'',  # line 52

### ../lists/list_persons.inc.php   ###
'Tagline'                     =>'',  # line 59