Wiper/ˈwaɪpər/ Definition 1 of 4Pro Tip 1/3Vehicle Essentials Often refers to essential car parts for visibility in bad weather. During heavy rain, make sure your wipers are functioning properly. Pro Tip 2/3Cleaning Implement In a broader sense, used for devices that clean various surfaces. I had to use a window wiper to clear the fog on the glass. Pro Tip 3/3Not Human When used contextually, 'wiper' rarely refers to a person, but rather an item. The automated wiper on the robotic arm cleaned the conveyor belt.