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.See: WAIT ON.
[TahlilGaran] English Idioms Dictionary ▲