improper.
Unsuitable to needs or circumstances; inappropriate; inapt.
Meaning & usage
Unsuitable to needs or circumstances; inappropriate; inapt.
Not in keeping with conventional mores or good manners; indecent or immodest.
improper conduct
Not according to facts; inaccurate or erroneous.
Not consistent with established facts; incorrect.
Not properly named; See, for example, improper fraction.
Not specific or appropriate to individuals; general; common.
Of a complex random variable, correlated with its conjugate.
Where this word comes from
From Middle French impropre, from Latin improprius (“not proper”), from in- + proprius (“proper”). By surface analysis, im- + proper.
To appropriate; to assign (something, to someone) as a possession or prerogative.
Where this word comes from
From Middle English empropren, perhaps from an unattested Anglo-Norman variant enproprier of Anglo-Norman apropr(i)er, approprier, related to modern French approprier.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.