(chemistry) Any of a class of inert, semi-inorganic polymeric compounds (polysiloxanes), that have a wide range of thermal stability and extreme water repellence, used in a very wide range of industrial applications, and in prosthetic replacements for body parts.

(transitive) To join or treat (something) with a silicone-based product.

(informal, transitive) To enhance or reconstruct (a body part) with a prosthesis containing silicone.