Definition of patents:
(n) :
(law) An official document granting an appointment, privilege, or right, or some property or title; letters patent.
(n) :
(law) (specifically) (originally) A grant of a monopoly over the manufacture, sale, and use of goods.
(n) :
(law) (specifically) A declaration issued by a government agency that the inventor of a new invention has the sole privilege of making, selling, or using the claimed invention for a specified period.
(n) :
(by extension) A product in respect of which a patent (sense 1.2.2) has been obtained.
(n) :
(figuratively) A licence or (formal) permission to do something.
(n) :
(figuratively) A characteristic or quality that one possesses; in particular (hyperbolic) as if exclusively; a monopoly.