"As the family had no visitors that day, its four members dined alone together. "
Is that an oxymoron?

an oxymoron?

Or a paradoxymoron.

Dear Faldage: Only a viagrated moron could handle a paradoxies.

Naw. A paradox being essentially a measure of our lack of understanding, a paradoxymoron is something that seems to be an oxymoron only because we don't understand fully. For example: bright orange camo for hunters. It seems to be an oxymoron because the bright orange is to enhance visibility and the camo is to make the hunter less visible. It ceases to be an oxymoron when we realize that the deer are color-blind and cannot see the bright orange.

Dear Faldage: I have known many married couples often alone together in connubial misery. But the Dorrit family were not
mutually alientated. They just didn't have any Society moochers at the table for once.