wait on

wait on or wait upon  {v.}
1. To serve.
Sue has a summer job waiting on an invalid.
The clerk in the store asked if we had been waited upon.
2.  {formal}
To visit as a courtesy or for business.
We waited upon the widow out of respect for her husband.
John waited upon the President with a letter of introduction.
3. To follow.
Success waits on hard work.
Categories: formal success verb