Trademark dilution is a
trademark law concept giving the owner of a famous trademark
standing to forbid others from using that mark in a way that would lessen its uniqueness. In most cases, trademark dilution involves an unauthorized use of another's trademark on products that do not compete with, and have little connection with, those of the trademark owner. For example, a famous trademark used by one company to refer to hair care products might be
diluted if another company began using a similar mark to refer to
breakfast cereals or
spark plugs.