/ ˈsɪtɪŋ; NAmE / noun
1.
a period of time during which a court or a parliament deals with its business
2.
a time when a meal is served in a hotel, etc. to a number of people at the same time :
A hundred people can be served at one sitting (= at the same time) .
3.
a period of time that a person spends sitting and doing an activity :
I read the book in one sitting .
4.
a period of time when sb sits or stands to have their picture painted or be photographed