What is meant by wet and dry waste ?

Wet Waste and Dry Waste are identification and classification terms for type of waste based on their nature.
Wet Waste refers to all waste items that are organic like food items, soiled food wrappers, hygiene products, yard waste, tissues and paper towels, as well as any other soiled items that would contaminate the recyclables.
Dry Waste refers to all waste items that are not considered wet/soiled items. This includes both recyclable and non-recyclable materials. Dry waste includes items such as bottles, cans, clothing, plastic, wood, glass, metals and paper.

You can learn more about it at : https:/www.greensutra.in/waste-classification/