wait on somebody

Từ điển Oxford Advanced Learner 8th

▪ I. ˈwait on sb derived
to act as a servant to sb, especially by serving food to them
•‘Help yourself,’ she said, ‘I'm too tired to wait on you.’
Main entry: ↑wait_derived
 
▪ II. ˈwait on sth/sb derived
(informal, especially NAmE)to wait for sth to happen before you do or decide sth
•She is waiting on the result of a blood test.
Main entry: ↑wait_derived