What does imprecise mean?
Imprecise describes speech, writing, measurements, or reasoning that is not exact or sufficiently detailed. It is especially useful when something is broadly correct but expressed in vague, approximate, or ambiguous terms. For example, a witness may provide an imprecise account of an event, meaning that important details are missing or unclear, while an imprecise measurement may be close to the true value without being sufficiently exact for a particular purpose. The word is formal but common in academic, legal, scientific, and professional contexts, and it can also appear in ordinary conversation. Unlike inaccurate, which suggests that something may be wrong, imprecise primarily emphasizes a lack of precision. The related adverb imprecisely describes the manner of an imprecise action or statement, while imprecision names the condition itself. Together, these forms make imprecise useful whenever clarity and exactness matter but the available information or expression falls short.
adjectiveNot precise; lacking exactness, clarity, or accuracy in expression or detail.
- Not exact or accurate in detail; vague, approximate, or insufficiently precise.
"The witness gave an imprecise account of the events that had led to the accident."
"The study's conclusions are imprecise and do not fully explain the pattern in the data."
"His directions were imprecise, so we took several wrong turns before finding the entrance."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does imprecise come from?
Imprecise entered English in the early 17th century, drawing on Latin imprecisus, meaning “not exact” or “not carefully arranged.” Its underlying vocabulary is shared with precise and precision, which come from Latin praecisus, a related form associated with being cut off or made definite. The English negative formation developed alongside the established vocabulary of precision and exactness.
Related word forms
How imprecise is actually used
The word is formal but broadly understandable and neutral in tone. It commonly describes language, measurements, estimates, rules, and claims that lack precision. It is often less severe than inaccurate, which can imply that something is wrong rather than merely insufficiently exact.
Easily confused with imprecise
Both words mean lacking exactness, although inexact is more often used as a direct synonym, while imprecise can also suggest vague or insufficiently careful wording.