improper

Meaning

Adj

1. Unsuitable to needs or circumstances; inappropriate; inapt.
2. Not in keeping with conventional mores or good manners; indecent or immodest.
3. Not according to facts; inaccurate or erroneous.
4. Not consistent with established facts; incorrect.
5. Not properly named; See, for example, improper fraction.
6. (obsolete) Not specific or appropriate to individuals; general; common.
7. Of a complex random variable, correlated with its conjugate.

Verb

1. (obsolete, transitive) To appropriate; to limit.
2. (obsolete) To behave improperly

Synonyms

unsuitable

inappropriate

unbecoming

wrong

unfit

unseemly

indecent

incorrect

unfitting

incompatible

unsuited

unjust

obscene

immodest

undue

inadequate

inconvenient

indecorous

bad

👎

inept

unworthy

unconventional

useless

immoral

unlawful

bawdy

indiscreet

shameless

inopportune

unbefitting

unacceptable

inaccurate

untoward

wrongful

unsatisfactory

unapt

impermissible

unrighteous

inapt

dishonest

dishonorable

uncomely

unreasonable

undeserved

undesirable

out of place

incongruous

inapplicable

careless

unbeseeming

unfair

nonsensical

graceless

disgraceful

obnoxious

outlawed

profligate

recreant

risque

rude

scabrous

shameful

sinful

stupid

tactless

unaccepted

unaccredited

unauthorized

uncalled for

uncalled-for

undutiful

uneligible

unethical

ungentlemanly

unjustifiable

unlicenced

unlicensed

unmentionable

unneighborly

unneighbourly

unorderly

unorthodox

unprincipled

unprofessional

unqualified

unrealistically

unrepeatable

unsanctioned

unserviceable

untidy

untrue

vicious

villainous

wicked

worthless

dirty-minded

ill-matched

not fitting

not true

off-color

off colour

virtueless

not straight

ought not

fie-fie

too familiar

offensively familiar

amteurish

not fit to be done

not fit to be uttered

badly-behaved

not meet

not plausible

abandoned

misseeming

askew

clumsy

coarse

conflicting

corrupt

crooked

cruel

demoralized

depraved

different

dirty

disagreeable

discordant

discrepant

dishonourable

disorderly

disrespectful

dissolute

embarrassing

erroneous

evil-minded

false

good for nothing

gross

heartless

ill-mannered

imperfect

impolitic

impossible

impracticable

impudent

inadequately

inadmissible

inadvisable

inauthentic

incommensurate

incommensurately

inconclusive

inconsistent

ineligible

in error

inexpedient

injudicious

insufficient

irregular

irrelevant

lazy

loose

malapropos

miscasting

naughty

negligent

not right

Translations

impropio

impropre

unpassend

inconvenant

inapproprié

uygunsuz

ongepast

incorrect

ungehörig

ungeeignet

Pronounced as (IPA)

/ɪmˈpɹɒp.ə/

Etymology

From Middle French impropre, from Latin improprius (“not proper”), from in- + proprius (“proper”). By surface analysis, im- + proper.