"Dinner reservations" refers to making arrangements or booking a table at a restaurant in advance to ensure you have a seat and are served dinner at a specific time. Full definition
We made dinner reservations at the open - air beachfront restaurant and enjoyed cocktails and dinner as the sun went down for the evening. (katiesbliss.com)
The concierge service can help you make dinner reservations at any of the fine nearby restaurants, and point you to the locations of interest around the resort. (dunhilltraveldeals.com)
It kind of sucks being that we made dinner reservations for tomorrow night.... (designbyoccasion.com)