Protection for wall above basin

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ Re-tile the splashback between counter top and wall-hung cupboards. ▪ The sink was squared-off and old fashioned, with a white splashback and a tilting mirror.

Wiktionary Word definitions in Wiktionary
n. 1 (context uncountable countable English) Splashes of liquid, especially noxious liquid, rebounding from a surface. 2 (context countable English) A shield of an easily-cleaned material, such as those placed behind an oven top, kitchen sink, and industrial ...