Lead free means It doesn't contain lead. Lead is a heavy metal with atomic number 82. If ingested, lead is poisonous to animals, including humans. It damages the nervous system and causes brain disorders. Excessive lead also causes blood disorders in mammals.
The common element of the business definitions is that the quality of a product or service refers to the perception of the degree to which the product or service meets the customer's expectations. Quality has no specific meaning unless related to a specific function and/or object.
This term most commonly refers to products that contribute to green living or practices that help conserve resources like water and energy.