1a meeting of an official body, especially a legislature, council, or court of law, to conduct its business:the governor called this week’s special session to reconsider the decision
a period during which an official body meets regularly to conduct its business:legislation to curb wildcat strikes will be introduced during the coming parliamentary session
the part of a year or of a day during which teaching takes place in a school or college.
2 [often with modifier] a period devoted to a particular activity:gym is followed by a training session
a period of recording music in a studio, especially by a session musician:he did the sessions for a Great Country Hits album
informal a period of heavy or sustained drinking:it was one hell of a session— we must have drunk about 12 cocktails each
3the governing body of a Presbyterian Church.
in session
assembled for or proceeding with business:throughout the long wait the court remained in session