Specification

The act of specifying or determining by a mark or limit; notation of limits.

The designation of particulars; particular mention; as, the specification of a charge against an officer.

A written statement containing a minute description or enumeration of particulars, as of charges against a public officer, the terms of a contract, the description of an invention, as in a patent; also, a single article, item, or particular, an allegation of a specific act, as in a charge of official misconduct.

(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

a detailed description of design criteria for a piece of work

naming explicitly