verb (sits, sitting; past and past participle sat /sat/)
- 5 [no object, in combination] live in someone’s house while they are away and look after their pet or pets:Fenella had been cat-sitting for meSee also babysit.
Old English sittan, of Germanic origin; related to Dutch zitten, German sitzen, from an Indo-European root shared by Latin sedere and Greek hezesthai
In sentences such as we were sat there for hours the use of the past participle sat with the verb ‘to be’ is informal and not part of standard English. Originally only in dialect, it is now common in British (though not US) English. Standard English uses the present participle sitting in similar contexts, as in we were sitting there for hours.