Filthiness/ˈfɪlθinəs/ Definition 1 of 3Pro Tip 1/3Physical Cleanliness Refers to actual dirt and mess, often in homes or cities. After the festival, the streets were in complete filthiness. Pro Tip 2/3Negative Connotation Describes a very dirty place or situation; stronger than 'dirty'. The neglected mansion's filthiness repelled the potential buyers. Pro Tip 3/3Health Implications Often associated with disease or poor hygiene, not just untidiness. The filthiness of the water source caused an outbreak.