What does exactness mean?
Exactness is the quality of being precise, accurate, and correct in every detail. It describes work, measurements, statements, or descriptions that correspond exactly to fact or standard, leaving nothing vague or approximate. A surveyor values exactness of measurement; a historian prizes exactness of citation; a translation succeeds through its exactness to the original text. Beyond mere accuracy, exactness often implies strictness or rigor — a conformity so complete that no deviation is tolerated, as in the exactness of a legal definition or a mathematical proof. The word sits in a formal register, common in academic, scientific, and literary prose, while everyday conversation tends to favor simpler terms like accuracy or precision. Its connotations are largely positive, suggesting care and competence, though applied to people it can suggest rigidity. Related forms include the adjective exact and the adverb exactly, both far more frequent than the noun itself.
The quality or state of being exact; accuracy and precision in detail, measurement, or conformity to a standard.
"The success of the experiment depended on the exactness of every measurement."
Often used in phrases like 'with exactness' or 'mathematical exactness'; slightly formal compared with 'accuracy' or 'precision'.
Strictness or rigor in adhering to rules, standards, or definitions.
"The statute was drafted with an exactness that precluded any alternative reading."
This sense emphasizes conformity rather than factual correctness, and appears chiefly in legal, philosophical, and formal writing.
As a mass noun denoting a quality, exactness is normally uncountable. The plural 'exactnesses' exists but is rare, used only to refer to distinct instances or varieties of exactness.
"Different disciplines prize different exactnesses — the mathematician's differs from the historian's."
Exactness comes from the Latin 'exigere' — literally 'to drive out' — the same root that gives us 'examine', so every act of examining something is, etymologically, driving out its errors.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of exactness
Exactness derives from the adjective exact plus the noun-forming suffix -ness. Exact entered English in the mid-16th century from Latin exactus, the past participle of exigere, meaning 'to drive out, demand, or measure thoroughly'. The same Latin root yields English words such as examine and exigent. Exactness itself is attested by the early 17th century and developed alongside synonyms like exactitude, which came later via French.
Related word forms
How exactness is actually used
Exactness is somewhat formal in register, appearing most often in academic, technical, and literary writing. In casual speech, speakers usually prefer 'accuracy' or 'precision'. The word can carry a slightly approving connotation when praising careful work, but may sound cold or pedantic when describing human behavior or relationships.
Easily confused with exactness
Exactitude is a near-synonym meaning precision, but it carries a more formal, sometimes literary register, while exactness is the plainer everyday noun.
An exaction is an act of demanding or extorting something (such as payment), whereas exactness refers to precision and has no sense of demand.