A document that prescribes, in a complete, precise, verifiable manner, the requirements, design, behavior, or characteristics of a system or system component. (source IEEE)
a detailed description of design criteria for a piece of work
a restriction that is insisted upon as a condition for an agreement
(patent law) a document drawn up by the applicant for a patent of invention that provides an explicit and detailed description of the nature and usse of an invention
naming explicitly
(patent law) a document drawn up by the applicant for a patent of invention that provides an explicit and detailed description of the nature and use of an invention