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Synonyms

improper

American  
[im-prop-er] / ɪmˈprɒp ər /

adjective

  1. not proper; not strictly belonging, applicable, correct, etc.; erroneous.

    He drew improper conclusions from the scant evidence.

    Synonyms:
    unfit, unsuited, inapplicable
    Antonyms:
    suitable, fitting
  2. not in accordance with propriety of behavior, manners, etc..

    improper conduct at a funeral.

    Synonyms:
    indecorous, unfit, unsuited, inapplicable
    Antonyms:
    proper
  3. unsuitable or inappropriate, as for the purpose or occasion.

    improper attire for a formal dance.

    Synonyms:
    unfit, unsuited, inapplicable
    Antonyms:
    suitable, fitting
  4. abnormal or irregular.

    improper functioning of the speech mechanism.


improper British  
/ ɪmˈprɒpə /

adjective

  1. lacking propriety; not seemly or fitting

  2. unsuitable for a certain use or occasion; inappropriate

    an improper use for a tool

  3. irregular or abnormal

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

What does improper mean? Improper describes something considered unsuitable or inappropriate for the purpose or occasion, as in A ballgown is improper dress for playing basketball.Improper also describes something that isn’t appropriate for a specific scenario or circumstance, as in Shouting out the answers during a silent test is generally considered improper.Improper can also describe something that is not correct, such as with an inaccurate conclusion or faulty language usage.Finally, improper can be used to describe something as abnormal or irregular, particularly in reference to how something mechanical operates.Example: We knew the test readouts were improper because the results were physically impossible.

Related Words

Improper, indecent, unbecoming, unseemly are applied to that which is unfitting or not in accordance with propriety. Improper has a wide range, being applied to whatever is not suitable or fitting, and often specifically to what does not conform to the standards of conventional morality: improper diet; improper behavior in church; improper language. Indecent, a strong word, is applied to what is offensively contrary to standards of propriety and especially of modesty: indecent behavior, literature. Unbecoming is applied to what is especially unfitting in the person concerned: conduct unbecoming a minister. Unseemly is applied to whatever is unfitting or improper under the circumstances: unseemly mirth.

Other Word Forms

  • improperly adverb
  • improperness noun

Etymology

Origin of improper

From the Latin word improprius, dating back to 1535–45. See im- 2, proper

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.

During a pretrial conference Thursday, the judge said at one point that it would be improper for the jury to consider what she would have earned had she stayed at Centerview beyond the three-year program.

From The Wall Street Journal

“Nothing in that police report protects you, that decision is about protecting our child’s well-being, not concealing anything improper,” the post said.

From Salon

The changes, championed by FCC Chairman Brendan Carr, are designed to crack down on wasteful spending and improper payments to deceased individuals and people without legal residency status.

From The Wall Street Journal

The alleged improper appointments were revealed by investigative TV program Cuarto Poder, which said five women were given jobs in the president's office and the environment ministry after visiting with Jeri.

From Barron's

In response to a request for comment on the improper redactions, a DOJ spokesperson told Salon the department “takes victim protection very seriously,” with a mind to “protect the innocent.”

From Salon