Definition from Wiktionary, the free dictionary
supper (plural suppers)
- Food consumed before going to bed.
- Any meal eaten in the evening; dinner eaten in the evening, rather than at noon.
- A drinker, especially one who drinks slowly (i.e., one who sups).
food before going to bed
dinner at night
Derived terms 
See also 
- To consume a snack before retiring.
- To eat dinner (see above).
to eat dinner
- plural indefinite of suppe