Meaning

1. to stay up, sit up
2. to keep guard, keep watch
3. to look after, see to ( + à); see to it that ( + à ce que)
4. to watch over (someone) ( + sur)
5. to keep watch over a sick person at night; to do a death wake for
6. to go out in the evening, e.g. in parties, clubs, bars…
7. to put in standby mode