Standard Lemma guide

improper

adj · verb · 11 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Received-Pronunciation: /ɪmˈpɹɒp.ə/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • Australian: /ɪmˈpɹɔp.ə/
  • General-American: /ɪmˈpɹɑ.pɚ/
  • General-American: Recorded audio is listed in the source snapshot.
  • rhymes with -ɒpə(ɹ)
  • CMU ARPABET: IH2 M P R AA1 P ER0 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Unsuitable to needs or circumstances; inappropriate; inapt.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Not in keeping with conventional mores or good manners; indecent or immodest.

Definition source: English Wiktionary via Wiktextract

Examples

  • improper conduct

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adj

Meaning 3

Not according to facts; inaccurate or erroneous.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

adj

Meaning 4

Not consistent with established facts; incorrect.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

adj

Meaning 5

Not properly named; See, for example, improper fraction.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

adj

Meaning 6

Not specific or appropriate to individuals; general; common.

Definition source: English Wiktionary via Wiktextract

Usage: obsolete

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

adj

Meaning 7

Of a complex random variable, correlated with its conjugate.

Definition source: English Wiktionary via Wiktextract

Topics: mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

verb

Meaning 8

To appropriate; to assign (something, to someone) as a possession or prerogative.

Definition source: English Wiktionary via Wiktextract

Usage: obsolete, transitive

Examples

  • For quotations using this term, see Citations:improper.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

adjective

Meaning 9

not suitable or right or appropriate

Definition source: Princeton WordNet 3.0

Examples

  • slightly improper to dine alone with a married man
  • improper medication
  • improper attire for the golf course

Meaning relationships

Synonyms: none provided

Antonyms: proper

10

adjective satellite

Meaning 10

not appropriate for a purpose or occasion

Definition source: Princeton WordNet 3.0

Examples

  • said all the wrong things

Meaning relationships

Synonyms: wrong

Antonyms: none provided

11

adjective satellite

Meaning 11

not conforming to legality, moral law, or social convention

Definition source: Princeton WordNet 3.0

Examples

  • an unconventional marriage
  • improper banking practices

Meaning relationships

Synonyms: unconventional, unlawful

Antonyms: none provided

History

Etymology

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

From Middle English empropren, perhaps from an unattested Anglo-Norman variant enproprier of Anglo-Norman apropr(i)er, approprier, related to modern French approprier.

Across languages

Translations

95 source translations are retained for this English entry.

  • Basque: ezegoki — unsuitable to needs or circumstances
  • Bulgarian: неподходящ (nepodhodjašt) — unsuitable to needs or circumstances
  • Bulgarian: неуместен (neumesten) — unsuitable to needs or circumstances
  • Catalan: impropi — unsuitable to needs or circumstances
  • Dutch: ongepast — unsuitable to needs or circumstances
  • Finnish: sopimaton — unsuitable to needs or circumstances
  • French: impropre — unsuitable to needs or circumstances
  • French: inapproprié — unsuitable to needs or circumstances
  • French: inadapté — unsuitable to needs or circumstances
  • German: unpassend — unsuitable to needs or circumstances
  • Greek: ακατάλληλος (akatállilos) — unsuitable to needs or circumstances
  • Hindi: अनुचित (anucit) — unsuitable to needs or circumstances
  • Japanese: そぐわない (soguwanai) — unsuitable to needs or circumstances
  • Japanese: 不適切な (futekisetsu na) — unsuitable to needs or circumstances
  • Latin: improprius — unsuitable to needs or circumstances
  • Norwegian: upassende — unsuitable to needs or circumstances
  • Norwegian: uegnet — unsuitable to needs or circumstances
  • Portuguese: impróprio — unsuitable to needs or circumstances
  • Romanian: impropriu — unsuitable to needs or circumstances
  • Russian: неуме́стный (neuméstnyj) — unsuitable to needs or circumstances
  • Russian: неподходя́щий (nepodxodjáščij) — unsuitable to needs or circumstances
  • Russian: ненадлежа́щий (nenadležáščij) — unsuitable to needs or circumstances
  • Slovak: nevhodný — unsuitable to needs or circumstances
  • Slovene: neprimeren — unsuitable to needs or circumstances
  • Tagalog: di-angkop — unsuitable to needs or circumstances
  • Turkish: uygunsuz — unsuitable to needs or circumstances
  • Ukrainian: ненале́жний (nenaléžnyj) — unsuitable to needs or circumstances
  • Ukrainian: невідпові́дний (nevidpovídnyj) — unsuitable to needs or circumstances
  • Armenian: անպիտան (anpitan) — not in keeping with conventional mores or good manners
  • Armenian: անվայել (anvayel) — not in keeping with conventional mores or good manners
  • Bulgarian: неприличен (nepriličen) — not in keeping with conventional mores or good manners
  • Bulgarian: непристоен (nepristoen) — not in keeping with conventional mores or good manners
  • Catalan: impropi — not in keeping with conventional mores or good manners
  • Danish: upassende — not in keeping with conventional mores or good manners
  • Danish: uanstændig — not in keeping with conventional mores or good manners
  • Dutch: ongeschikt — not in keeping with conventional mores or good manners
  • Dutch: misplaatst — not in keeping with conventional mores or good manners
  • Finnish: säädytön — not in keeping with conventional mores or good manners
  • Finnish: sopimaton — not in keeping with conventional mores or good manners
  • French: impropre — not in keeping with conventional mores or good manners
  • French: inconvenant — not in keeping with conventional mores or good manners
  • French: grossier — not in keeping with conventional mores or good manners
  • German: unhöflich — not in keeping with conventional mores or good manners
  • Greek: ανάρμοστος (anármostos) — not in keeping with conventional mores or good manners
  • Hindi: अशोभनीय (aśobhnīya) — not in keeping with conventional mores or good manners
  • Hindi: अमर्यादित (amaryādit) — not in keeping with conventional mores or good manners
  • Irish: aindílis — not in keeping with conventional mores or good manners
  • Latin: indecens — not in keeping with conventional mores or good manners
  • Norwegian: upassende — not in keeping with conventional mores or good manners
  • Norwegian: uanstendig — not in keeping with conventional mores or good manners
  • Portuguese: impróprio — not in keeping with conventional mores or good manners
  • Portuguese: indecente — not in keeping with conventional mores or good manners
  • Portuguese: indecoroso — not in keeping with conventional mores or good manners
  • Russian: непристо́йный (nepristójnyj) — not in keeping with conventional mores or good manners
  • Russian: неприли́чный (neprilíčnyj) — not in keeping with conventional mores or good manners
  • Russian: некорре́ктный (nekorréktnyj) — not in keeping with conventional mores or good manners
  • Sanskrit: अकार्य (akārya) — not in keeping with conventional mores or good manners
  • Slovak: nevhodný — not in keeping with conventional mores or good manners
  • Spanish: improprio — not in keeping with conventional mores or good manners
  • Spanish: impropio — not in keeping with conventional mores or good manners
  • Spanish: indebido — not in keeping with conventional mores or good manners
  • Tagalog: di-angkap — not in keeping with conventional mores or good manners
  • Turkish: uygunsuz — not in keeping with conventional mores or good manners
  • Turkish: yakışıksız — not in keeping with conventional mores or good manners
  • Ukrainian: непристо́йний (neprystójnyj) — not in keeping with conventional mores or good manners
  • Ukrainian: некоре́ктний (nekoréktnyj) — not in keeping with conventional mores or good manners
  • Bulgarian: неточен (netočen) — Not according to facts
  • Bulgarian: неправилен (nepravilen) — Not according to facts
  • Dutch: onjuist — Not according to facts
  • Dutch: foutief — Not according to facts
  • Finnish: väärä — Not according to facts
  • Norwegian: uriktig — Not according to facts
  • Norwegian: feilaktig — Not according to facts
  • Norwegian: urettmessig — Not according to facts
  • Portuguese: impróprio — Not according to facts
  • Portuguese: incorreto — Not according to facts
  • Russian: непра́вильный (neprávilʹnyj) — Not according to facts
  • Russian: оши́бочный (ošíbočnyj) — Not according to facts
  • Russian: ло́жный (lóžnyj) — Not according to facts
  • Slovak: nesprávny — Not according to facts
  • Turkish: yanlış — Not according to facts
  • Dutch: inconsistent — Not consistent with established facts
  • Dutch: foutief — Not consistent with established facts
  • Norwegian: uriktig — Not consistent with established facts
  • Portuguese: impróprio — Not consistent with established facts
  • Portuguese: incorreto — Not consistent with established facts
  • Russian: непра́вильный (neprávilʹnyj) — Not consistent with established facts
  • Slovak: nesprávny — Not consistent with established facts
  • Catalan: impropi — Not properly named
  • Dutch: verkeerd omschreven — Not properly named
  • French: impropre — Not properly named
  • Japanese: そぐわない (soguwanai) — Not properly named
  • Japanese: 不適切な (futekisetsu na) — Not properly named
  • Norwegian: feilaktig — Not properly named
  • Portuguese: impróprio — Not properly named