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

a period of sitting

a sit in the shade

the way in which an item of clothing fits someone

the sit of her frock