wait on

verb

1. To provide a service to (someone); to act as a servant to (someone); to serve (someone) as a waiter or waitress in a restaurant.

   “Is someone waiting on you yet?”

   “How now, Simple! where have you been? I must wait on myself, must I?”

2. To wait for (a person).

   “I'm waiting on you before we can leave.”

   “Wait on the LORD: be of good courage, and he shall strengthen thine heart:”

3. To wait for (a thing, or an event to take place).

   “I'm waiting on the light to change.”

   “[…] a time was coming […] when his waiting on events should have its reward.”

4. To be in store for (someone).

   “the destruction that waits on Monarchs, who consider fidelity to them as the most degrading of all vices”

   “Their wages wouldn’t even get them out of debt to my grandmother, not to mention the staggering bill that waited on them at the white commissary downtown.”

5. To visit (someone) as a courtesy, on business or for ceremony.

   “In the Evening our Commander sent a Message to Mr. Jones, that if a Visit would not be troublesome he would wait on him.”

   “The ladies of Longbourn soon waited on those of Netherfield. The visit was returned in due form.”

6. To occur as a consequence of (something), to result from (something).

   “that ruine which waits upon such a supine temper”

   “For Blessings ever wait on virtuous Deeds; And tho’ a late, a sure Reward succeeds.”

7. To carry out or perform (a duty, function, etc.).

   “Aaron and his sons […] shall wait on their priest’s office:”

8. To fly above its master, waiting till game is sprung.
9. To court (someone).
10. To obey and pay attention to (someone); to follow (a leader); to attend to (someone); to be subject to (someone).