- (dated) The evening meal for servants, separate from the family's meal.
The cook prided herself on making the kitchen supper as delicious as the family's dinner.
- An informal or semiformal meal served for guests, not necessarily one served in the kitchen.
The couple threw an impromptu kitchen supper when the dinner reservations fell through.
For usage examples of this term, see Citations:kitchen supper.
In contemporary British use, the phrase is seen as snobbish and very U. Charles Moore in The Daily Telegraph describes it as "disclosing an assumption – we have a nice dining room but we’ll be all relaxed with our pals and won’t use it – which is perplexingly, excludingly foreign to [a general] audience", while Harry Mount says that "[although] the ingredients of a kitchen supper are universally recognisable [...] the actual expression is confined to the upper-middle classes".