- 1 a period of time during which a court or a governing body deals with its business late-night sittings in the legislature
- 2a 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).
- 3a period of time that a person spends sitting and doing an activity I read the book in one sitting.
- 4a period of time when someone sits or stands to have their picture painted or be photographed It took three sittings to complete the portrait.