What does specification mean?
A specification is a precise description of the qualities, features, or requirements that something is expected to have. It is especially common in engineering, manufacturing, construction, technology, law, and project planning, where detailed requirements help parties agree on standards and evaluate whether work or a product meets expectations. The word can refer both to the information itself and to the formal document that records it. In everyday use, “specifications” may mean a detailed list of features, as when describing a vehicle's equipment or a device's technical capabilities. Its associations are chiefly practical and authoritative: specifications are intended to remove ambiguity, establish criteria, and make actions accountable. The word therefore carries a formal, procedural tone and is well suited to contexts in which precision matters.
nounA detailed statement of requirements, qualities, or features that describes what something must or should be. It may also refer to the act of specifying these details.
- A detailed statement or description of requirements, qualities, or features.
- The act or process of stating such details precisely.
- A formal document containing the requirements for a product, system, or project.
"The architect prepared a precise specification of the building's materials and dimensions."
"The new equipment must conform to the manufacturer's specifications."
"Her proposal was rejected because it lacked a clear specification of the intended audience."
The plural is common when referring to a detailed list of technical, product, design, or project requirements.
"The specifications require all components to meet the stated safety standards."
A specification turns a vague idea into precise requirements, making it one of engineering's most useful tools for preventing misunderstandings.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does specification come from?
The word entered English through Old French specification, which derived from Latin specificatio, a noun meaning “a statement of particulars” or “a defining.” Its deeper roots lie in the Latin verb specere, “to look at,” through the development of specificus, “having a particular kind,” and related forms such as specificare, “to state specifically.” The English sense developed from the idea of describing something in detail and stating its distinctive qualities. Its relatives include specify, specific, specimen, and classifier, all connected with the same Latin tradition of identifying or distinguishing.
Related word forms
How specification is actually used
In technical and legal contexts, the word is commonly used with an attributive noun, as in “technical specifications” or “design specifications.” It is often countable and appears in the plural when referring to the detailed requirements for a product or project.
Easily confused with specification
A specification states requirements or detailed features; a specification sheet is a document listing those requirements for a particular product or project.
A specification describes required qualities or features, whereas a specimen is an actual example used for examination, display, or analysis.