lunch, esp. a formal lunch held in connection with a meeting or other special occasion: the alumni luncheon.
Origin: 1570–80; dissimilated var. of nuncheon (now dial.), ME none(s)chench noon drink, equiv. to nonenoon+ schench, OE scenc a drink, cup, akin to OE scencan to pour out, give drink, c. D, G schenken
An afternoon party at which a light meal is served.
[Probably alteration (influenced by dialectal lunch, hunk of cheese or bread) of obsolete nuncheon, light snack, from Middle English nonshench : none, noon; see noon + schench, drink (from Old English scenc, from scencan, to pour out).]