A detailed, exact statement of particulars, especially a statement prescribing materials, dimensions, and quality of work for something to be built, installed, or manufactured, An exact written description of an invention by an applicant for a patent, The act of making specific, or the state of having a specific character; reference to or correlation with a species or kind; determination of species or specific relation

A relationship or connection between two things based on co-occurrence or pattern of change, a reciprocal relation between two or more things, a statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other