backsplash /ˈbækˌsplæʃ/noun 2verb 1forms 3 noun2 •A vertical covering on a wall rising above a countertop or other work surface to protect the wall from spills and to decorate the wall. •The small splash of water that occurs when an oar enters the water to begin a stroke, just before the rower reaches the catch. verb1 •To splash backward.More importantly, the use of the delta tube prevents dangerous backsplashing of the agent that can occur when an impinging sparger is used improperly. — 2004 formsbacksplashed · backsplashing · backsplashes