What does imprecision mean?
Imprecision is the condition of being vague, approximate, or insufficiently exact. It commonly describes language that fails to communicate a specific meaning, as well as measurements, descriptions, rules, or arguments that lack precision. A statement can be broadly true yet imprecise if its wording leaves important questions unanswered or uses terms that permit multiple interpretations. The noun is especially associated with formal discussion of writing and accuracy, but it can apply to almost any system in which distinctions are not handled exactly. Its close relatives are imprecision in measurement and approximation in judgment. The word is useful because it identifies a problem more specific than simple falsehood: a claim may be neither true nor false if it is expressed too broadly, too loosely, or without enough detail to support a definite conclusion. Addressing imprecision often involves replacing vague language with clearly defined terms and making the basis of a claim explicit.
nounThe quality of being imprecise or inaccurate, especially in language, measurement, or expression. It refers to a lack of exactness, precision, or clear detail.
- Lack of exactness or precision in language, expression, or detail.
- Approximation or uncertainty in a measurement, description, or claim.
"The report was weakened by the imprecision of its estimates."
"His reply was so vague that its imprecision obscured his actual position."
"The instrument's imprecision makes it useful for rough measurements but unsuitable for fine work."
The plural is possible but uncommon; imprecision is normally used as an uncountable noun for a general lack of exactness.
"The report acknowledged several small imprecisions in its description of the data."
Imprecision is the quiet way a sentence can be technically defensible yet still leave its meaning uncertain.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does imprecision come from?
Imprecision was formed in the 19th century from the prefix im-, meaning “not,” and precision, from Latin praecisio, a “cutting off” or exact definition. The underlying root relates to the Latin verb praecidere, meaning “to cut off” or “to determine precisely.” The related English words precise and precision entered English through French and Latin in the 16th century, while imprecision developed later as a systematic negative formation.
Related word forms
How imprecision is actually used
Imprecision is formal and often used in discussion of writing, measurement, or reasoning. It is less common in everyday speech than vagueness or inaccuracy, but it is useful when the issue is specifically a lack of exactness rather than a definite factual error.
Easily confused with imprecision
Imprecision is a lack of exactness or accuracy, whereas precision is the quality of being exact and carefully defined.
Inaccuracy suggests that something is wrong or incorrect, while imprecision more specifically emphasizes vagueness, approximation, or insufficient exactness.