/ ˈseʃn; NAmE / noun
1.
a period of time that is spent doing a particular activity :
a photo / recording / training, etc. session
The course is made up of 12 two-hour sessions.
—see also jam session
2.
a formal meeting or series of meetings of a court, a parliament, etc.; a period of time when such meetings are held :
a session of the UN General Assembly
The court is now in session .
The committee met in closed session (= with nobody else present) .
—see also quarter sessions
3.
a school or university year
4.
an occasion when people meet to play music, especially Irish music, in a pub / bar
••
WORD ORIGIN
late Middle English : from Old French , or from Latin sessio(n-) , from sess- seated, from the verb sedere .