1. a period of time spent seated, especially for a particular activity
2. a scheduled period when a court, legislature, or other official body meets

1. in a seated position; not standing
2. currently holding office or serving in a position

Examples

• The portrait required three long sittings to complete.
• Parliament will resume sitting next week.
• The sitting passengers offered their seats to elderly riders.
• The sitting president announced new policies.
• She finished the entire book in one sitting.
• The sitting room was decorated with antique furniture.
• All sitting members of the committee voted in favor.