Definitions of session:

• noun:   a meeting devoted to a particular activity

  Example: "A filming session"

• noun:   a meeting for execution of a group's functions

  Example: "It was the opening session of the legislature"

• noun:   a meeting of spiritualists
• noun:   the time during which a school holds classes
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #7723)