Dinner/ˈdɪnər/ Definition 1 of 3Pro Tip 1/3Time Variety Some cultures eat their main meal at midday while others in the evening. Back home, dinner is at noon, but here it's at 7 p.m. Pro Tip 2/3Social Event 'Dinner' often implies a social gathering, not just eating food. Are you coming to the Smiths' dinner next Friday? Pro Tip 3/3Casual or Formal The term can be used for both casual family meals and more formal settings. Let's have dinner together. Nothing fancy, just pizza at my place.