Processed foods is any food that has been altered in some way during production or preparation.

Examples of common processed foods include breakfast cereals, cheese, canned and frozen vegetables, bread, noodles and pasta, savoury snacks such as crisps and biscuits, microwave or ready-to-eat meals, oils, processed meats such as luncheon meat and jerky, and drinks such as milk, juice and coffee.

There's more, most "whole foods" in supermarkets can be classified as processed foods as they are genetically modified or were raised and fed with antibiotics enriched processed feeds.