Source : Webster's Revised Unabridged Dictionary (1913)

Nunchion \Nun"chion\, n. [OE. nonechenche, for noneschenche,
   prop., a noon drink; none noon + schenchen, schenken,
   skinken, to pour, AS. scencan. See {Noon}, and {Skink}, v.
   i.]
   A portion of food taken at or after noon, usually between
   full meals; a luncheon. [Written also {noonshun}.]
   --Hudibras.