1. to be on hold:
to be waiting to talk to a person on the phone
- I need to talk to someone in customer service, but I have been on hold for 45 minutes.
- I hate it when I am on hold.
2. to get an upgrade:
to get a better version of something
- We got an upgrade at the hotel. They gave us a suite.
- The rental car agency made a mistake with our reservation, so we got a free upgrade.
3. a supervisor:
a manager or boss who watches and makes sure work is being done correctly
- My supervisor is not nice.
- Her supervisor yells at the employees. Everybody hates him.