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Showing results for improper.
Definitions

improper

[im-prop-er] / ɪmˈprɒp ər /
ADJECTIVE
not suitable
Synonyms
STRONGEST
awkward erroneous false ill-advised imprudent inaccurate inadmissible inappropriate incorrect irregular unwarranted wrong
WEAK
abnormal at odds bad form discordant discrepant ill-timed inadvisable inapplicable inapposite inapt incongruous inexpedient infelicitous inharmonious inopportune ludicrous malapropos odd off-base out of place out-of-season preposterous unapt unbefitting uncalled-for uncomely undue unfit unfitting unseasonable unsuitable unsuited untimely
Antonyms
STRONGEST
OK acceptable accurate appropriate correct honest reasonable right suitable true valid wise
WEAK
de rigueur decent fitting formal good moral proper uncorrupt
ADJECTIVE
vulgar, immoral
Synonyms
STRONGEST
indecent unethical unjust unseemly untoward wrong wrongful
WEAK
blue dirty impolite indecorous indelicate lewd malodorous naughty risqué rough salacious suggestive unbecoming unconventional unequitable ungodly unrighteous unrightful
Antonyms
STRONGEST
acceptable appropriate decent ethical fair good honest just moral proper right suitable
WEAK
correct fitting formal uncorrupt

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He said the company self-reported improper conduct by an individual employee during that period.

From The Wall Street Journal • Apr. 1, 2026

"It is illegal and improper because there is no risk of him fleeing or avoiding questioning," he said.

From BBC • Mar. 27, 2026

CHP officials regularly conduct enforcement operations targeting improper use of carpool lanes, including drivers attempting to evade rules by using mannequins or other objects to mimic passengers.

From Los Angeles Times • Mar. 17, 2026

"The Court therefore finds that the subpoenas were issued for an improper purpose and will quash them."

From Barron's • Mar. 13, 2026

In a very improper voice, Jaya said, “I order you to stay for dinner!”

From "The Wild Robot Escapes" by Peter Brown

Vocabulary lists containing improper

CTE Construction ("Core Curriculum: Introductory Craft Skills,") Vocabulary from Module One

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im-

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Way Off: Synonyms for "Wrong"

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