For us, dinner and supper are alternate terms for the evening meal. I did grow up around some folks who referred to the mod-day meal as dinner, but I never did.

Breakfast and lunch were the first two. I mean, school had a lunch room, not a dinner room, and it was staffed by the lunch ladies, not the dinner ladies.

I have been to both dinner parties and progressive suppers.

If you get invited to dinner at my house, it'll be after 6. If I say barbecue, then that's what we are eating, not the act of smoking meat to create barbecue. Burgers and hot dogs is cooking out or grilling.