luncheon /ˈlʌn.tʃən/noun 5verb 2forms 3 noun5 •A formal meal served in the middle of the day.Most people thought the food at the luncheon was mediocre. •(old-fashioned) Any midday meal; lunch."Have you had luncheon?" — 1931 •(New-Zealand) A large, cheap, processed sausage served in thin slices.Ian bought the luncheon since it was on special. •(no longer used) A portion of food taken at any time except at a regular meal; an informal or light repast. •(no longer used) A lump of food. verb2 •(old-fashioned) To eat luncheon.In the meantime, while ladies are luncheoning on chicken pie, or coursing in whirling britskas, performing all the singular ceremonies of a London morning in the heart of the season[…] — 1844 •(rare) To serve luncheon to.This gentleman was presented by Colonel C. E. S. Wood, and was entertained here—wined, dined, tead, breakfasted, coffeed and luncheoned—and we bought his pictures. — 1909 formsluncheoned · luncheoning · luncheons