session in WordNet English dictionary

1. the time during which a school holds classes
   "they had to shorten the school term"
   school term  academic term  academic session  session 
   
2. a meeting of spiritualists
   "the seance was held in the medium's parlor"
   seance  sitting  session 
   
3. a meeting devoted to a particular activity
   "a filming session"; "a gossip session"
   session 
   
4. a meeting for execution of a group's functions
   "it was the opening session of the legislature"
   session