Collins COBUILD Advanced Learner's English Dictionary - untreated

1. If an injury or illness is left untreated, it is not given medical treatment. If left untreated the condition may become chronic. ...the consequences of untreated tuberculosis. ADJ: ADJ after v, ADJ n, v-link ADJ 2. Untreated materials, water, or chemicals are harmful and have not been made safe. ...the dumping of nuclear waste and untreated sewage. ADJ: usu ADJ n 3. Untreated materials are in their natural or original state, often before being prepared for use in a particular process. All the bedding is made of simple, untreated cotton... In its untreated state the carbon fibre material is rather like cloth. = raw ADJ: usu ADJ n