a continuous period of being seated, especially when engaged in a particular activity

twenty pieces of music is a bit much to take in at one sitting

a scheduled period of time when a number of people are served a meal, especially in a restaurant

there will be two sittings for Christmas lunch

a period of time during which a committee or parliament is engaged in its normal business

all-night sittings of Parliament

in a seated position

a sitting position

(of an MP or other elected representative) current; present

the resignation of the sitting member

(of a hen or other bird) settled on eggs for the purpose of incubating them

adopt or be in a position in which one's weight is supported by one's buttocks rather than one's feet and one's back is upright

I sat next to him at dinner

you can sit wherever you like

be or remain in a particular position or state

the fridge was sitting in a pool of water

(of a parliament, committee, court of law, etc.) be engaged in its business

Parliament continued sitting until March 16

take (an examination)

pupils are required to sit nine subjects at GCSE

he was about to sit for his Cambridge entrance exam

live in someone's house while they are away and look after their pet or pets

Kelly had been cat-sitting for me

I puppy-sat for Katie a couple of weeks ago