/ ˈsʌpə(r); NAmE / noun
[ U , C ] the last meal of the day, either a main meal, usually smaller and less formal than dinner, or a snack eaten before you go to bed :
I'll do my homework after supper.
What's for supper?
We'll have an early supper tonight.
—compare tea (6) ➡ note at meal
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WORD ORIGIN
Middle English : from Old French super to sup (used as a noun), of Germanic origin.