lunching lunc·hing UK/ˈlʌnt͡ʃɪŋ/ US/ˈlʌntʃɪŋ/ rare noun 1. the act of eating lunch Related words Word family lunch Broader terms eating WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.