luncheon

 
Pronunciation: /ˈlʌn(t)ʃ(ə)n/

noun

  • a formal lunch, or a formal word for lunch: a ladies' luncheon was taking place

Origin:

late 16th century (in the sense 'thick piece, hunk'): possibly an extension of obsolete lunch 'thick piece, hunk', from Spanish lonja 'slice'