session (sessions plural )
1 n-count A session is a meeting of a court, parliament, or other official group.
...an emergency session of parliament...
2 n-count A session is a period during which the meetings of a court, parliament, or other official group are regularly held.
The parliamentary session ends on October 4th...
3 n-count A session of a particular activity is a period of that activity.
The two leaders emerged for a photo session.
4 adj Session musicians are employed to play backing music in recording studios.
He established himself as a session musician.