"The dinner is fish and soup."
Translation:Το δείπνο είναι ψάρι και σούπα.
Δείπνο is more formal and can be used for formal dinners. πχ: επαγγελματικό δείπνο and not επαγγελματικό βραδινό.
Yes, but δείπνο is always night meal. (contrary to english where dinner can be any formal meal, i think.)
In British English, the use of 'dinner' also varies by region. Most areas refer to the three main meals of the day as breakfast, lunch, and dinner, yet other regions use breakfast, dinner, and tea. :)