Webster’s Revised Unabridged Dictionary · 1913
Luncheon
Lunch′eon (lŭnch′ŭn), n. [Prov. E. luncheon, lunchion, lunshin, a large lump of food, fr. lunch. See Lunch.]
1. A lump of food. [Prov. Eng.]
2. A portion of food taken at any time except at a regular meal; an informal or light repast, as between breakfast and dinner.
Lunch′eon, v. i. To take luncheon. Beaconsfield.