Standard Lemma guide

illegal

adj · noun · 10 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.

  • UK: /ɪˈliːɡəl/
  • US: ĭ.lē'gəl
  • US: /ɪˈli.ɡəl/
  • US: [ɪɫˈli.ɡəɫ]
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -iːɡəl
  • CMU ARPABET: IH2 L IY1 G AH0 L Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Contrary to, forbidden, or not authorized by law, especially criminal law.

Definition source: English Wiktionary via Wiktextract

Examples

  • This is illegal, you know!
  • Nearly 40 million people live in UK areas with illegal air pollution
  • Their illegal mining operations in Asia, Africa and elsewhere, are protected by officials and police paid to look the other way – and powerful customers in the construction industry who prefer not to ask too many questions.

Meaning relationships

Synonyms: criminal, felonious, illicit, irregular, crimeful, illegal, illegitimate, lawbreaking, nonlawful, outlawed, unlawful, wrongful

Antonyms: lawful, legal, de jure, legitimate, licit, rightful

2

adj

Meaning 2

Forbidden by established rules.

Definition source: English Wiktionary via Wiktextract

Examples

  • Moving a pawn backward is an illegal move in chess.
  • The computer program performed an illegal operation and was terminated.

Meaning relationships

Synonyms: banned, disallowed, forbidden, impermissible, illegal, illicit, interdicted, nonallowed, nonlicet, prohibited, proscribed, proscript, unallowed, unpermitted, verboten

Antonyms: none provided

3

adj

Meaning 3

Totally fictitious, and often issued on behalf of a non-existent territory or country.

Definition source: English Wiktionary via Wiktextract

Topics: hobbies, lifestyle, philately

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: bogus

Antonyms: none provided

4

adj

Meaning 4

Being or doing something illegally.

Definition source: English Wiktionary via Wiktextract

Usage: offensive, sometimes

Examples

  • illegal immigrant
  • illegal logger
  • illegal pilot

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

adj

Meaning 5

Being an illegal immigrant; residing in a country illegally.

Definition source: English Wiktionary via Wiktextract

Usage: US, offensive, sometimes

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: undocumented

Antonyms: none provided

6

noun

Meaning 6

An illegal act or technique.

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

noun

Meaning 7

Contraband, esp. illegal substances such as drugs.

Definition source: English Wiktionary via Wiktextract

Usage: colloquial, in-plural

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

noun

Meaning 8

Ellipsis of illegal immigrant.

Definition source: English Wiktionary via Wiktextract

Usage: abbreviation, alt-of, colloquial, ellipsis, offensive

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

noun

Meaning 9

A spy operating abroad illegally and under non-official cover, without visible ties to his or her country’s authorities.

Definition source: English Wiktionary via Wiktextract

Topics: espionage, government, military, politics, war

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

10

adjective

Meaning 10

prohibited by law or by official or accepted rules

Definition source: Princeton WordNet 3.0

Examples

  • an illegal chess move

Meaning relationships

Synonyms: none provided

Antonyms: legal

History

Etymology

Borrowed from French illégal, from Medieval Latin illegalis, from Latin legalis, by surface analysis, il- + legal. In senses relating to immigration, via clipping of illegal alien or illegal immigrant.

Across languages

Translations

147 source translations are retained for this English entry.

  • Albanian: paligjshme — contrary to or forbidden by law
  • Arabic: غَيْر قَانُونِيٍّ (ḡayr qānūniyyin) — contrary to or forbidden by law
  • Armenian: ապօրինի (apōrini) — contrary to or forbidden by law
  • Armenian: անօրինական (anōrinakan) — contrary to or forbidden by law
  • Assamese: চোৰাং (süraṅ) — contrary to or forbidden by law
  • Assamese: আইন বিৰোধী (ain birüdhi) — contrary to or forbidden by law
  • Assamese: অবৈধ (oboidh) — contrary to or forbidden by law
  • Assamese: বেআইনী (beaini) — contrary to or forbidden by law
  • Asturian: illegal — contrary to or forbidden by law
  • Azerbaijani: qanunsuz — contrary to or forbidden by law
  • Azerbaijani: qeyri-qanuni — contrary to or forbidden by law
  • Azerbaijani: qeyri-leqal — contrary to or forbidden by law
  • Belarusian: незако́нны (njezakónny) — contrary to or forbidden by law
  • Belarusian: нелега́льны (njeljehálʹny) — contrary to or forbidden by law
  • Bulgarian: незаконен (nezakonen) — contrary to or forbidden by law
  • Bulgarian: нелегален (nelegalen) — contrary to or forbidden by law
  • Catalan: il·legal — contrary to or forbidden by law
  • Chinese Mandarin: 非法的 (fēifǎ de) — contrary to or forbidden by law
  • Chinese Mandarin: 不合法的 (bùhéfǎ de) — contrary to or forbidden by law
  • Chinese Mandarin: 不法的 (bùfǎ de) — contrary to or forbidden by law
  • Czech: ilegální — contrary to or forbidden by law
  • Czech: nezákonný — contrary to or forbidden by law
  • Dutch: strafbaar — contrary to or forbidden by law
  • Dutch: illegaal — contrary to or forbidden by law
  • Dutch: onwettig — contrary to or forbidden by law
  • Esperanto: kontraŭleĝa — contrary to or forbidden by law
  • Estonian: ebaseaduslik — contrary to or forbidden by law
  • Estonian: illegaalne — contrary to or forbidden by law
  • Estonian: seadusvastane — contrary to or forbidden by law
  • Finnish: laiton — contrary to or forbidden by law
  • Finnish: lainvastainen — contrary to or forbidden by law
  • French: illégal — contrary to or forbidden by law
  • Galician: ilícito — contrary to or forbidden by law
  • Galician: ilegal — contrary to or forbidden by law
  • Georgian: უკანონო (uḳanono) — contrary to or forbidden by law
  • Georgian: არაკანონიერი (araḳanonieri) — contrary to or forbidden by law
  • Georgian: არალეგალური (aralegaluri) — contrary to or forbidden by law
  • Georgian: კანონსაწინააღმდეგო (ḳanonsac̣inaaɣmdego) — contrary to or forbidden by law
  • Georgian: აკრძალული (aḳrʒaluli) — contrary to or forbidden by law
  • German: illegal — contrary to or forbidden by law
  • German: rechtswidrig — contrary to or forbidden by law
  • Greek: παράνομος (paránomos) — contrary to or forbidden by law
  • Greek: έκνομος (éknomos) — contrary to or forbidden by law
  • Greek: άνομος (ánomos) — contrary to or forbidden by law
  • Ancient Greek: παράνομος (paránomos) — contrary to or forbidden by law
  • Ancient Greek: ἀθέμιτος (athémitos) — contrary to or forbidden by law
  • Hawaiian: kū ʻole i ke kānāwai — contrary to or forbidden by law
  • Hawaiian: mawaho o ke kānāwai — contrary to or forbidden by law
  • Hebrew: בלתי חוקי (biltí khukí) — contrary to or forbidden by law
  • Hindi: अवैध (avaidh) — contrary to or forbidden by law
  • Hindi: ग़ैरक़ानूनी (ġairqānūnī) — contrary to or forbidden by law
  • Hindi: ख़िलाफ़क़ानून (xilāfqānūn) — contrary to or forbidden by law
  • Hungarian: illegális — contrary to or forbidden by law
  • Icelandic: ólöglegur — contrary to or forbidden by law
  • Irish: neamhdhleathach — contrary to or forbidden by law
  • Irish: aindleathach — contrary to or forbidden by law
  • Irish: mídhleathach — contrary to or forbidden by law
  • Irish: neamhdhlíthiúil — contrary to or forbidden by law
  • Italian: illegale — contrary to or forbidden by law
  • Japanese: 不法の (fuhō no) — contrary to or forbidden by law
  • Japanese: 違法の (ihō no) — contrary to or forbidden by law
  • Kazakh: заңсыз (zañsyz) — contrary to or forbidden by law
  • Khmer: ខុសច្បាប់ (khosachbab) — contrary to or forbidden by law
  • Korean: 불법적인 (bulbeopjeog-in) — contrary to or forbidden by law
  • Northern Kurdish: neqanûnî — contrary to or forbidden by law
  • Northern Kurdish: qedexe — contrary to or forbidden by law
  • Northern Kurdish: memnûh — contrary to or forbidden by law
  • Northern Kurdish: yasax — contrary to or forbidden by law
  • Northern Kurdish: qaçax — contrary to or forbidden by law
  • Northern Kurdish: derqanûn — contrary to or forbidden by law
  • Latin: illicitus — contrary to or forbidden by law
  • Latvian: pretlikumīgs — contrary to or forbidden by law
  • Lithuanian: neteisėtas — contrary to or forbidden by law
  • Macedonian: незаконски (nezakonski) — contrary to or forbidden by law
  • Macedonian: незаконит (nezakonit) — contrary to or forbidden by law
  • Macedonian: противзаконски (protivzakonski) — contrary to or forbidden by law
  • Macedonian: нелегален (nelegalen) — contrary to or forbidden by law
  • Macedonian: и́легален (ílegalen) — contrary to or forbidden by law
  • Malay: haram — contrary to or forbidden by law
  • Māori: turekore — contrary to or forbidden by law
  • Mongolian: хууль бус (xuulʹ bus) — contrary to or forbidden by law
  • Norwegian Bokmål: ulovlig — contrary to or forbidden by law
  • Norwegian Bokmål: forbudt — contrary to or forbidden by law
  • Norwegian Bokmål: lovstridig — contrary to or forbidden by law
  • Norwegian Bokmål: illegal — contrary to or forbidden by law
  • Norwegian Nynorsk: ulovleg — contrary to or forbidden by law
  • Occitan: illegal — contrary to or forbidden by law
  • Plautdietsch: onjesazlich — contrary to or forbidden by law
  • Polish: nielegalny — contrary to or forbidden by law
  • Portuguese: ilegal — contrary to or forbidden by law
  • Romanian: ilegal — contrary to or forbidden by law
  • Romanian: nelegal — contrary to or forbidden by law
  • Russian: незако́нный (nezakónnyj) — contrary to or forbidden by law
  • Russian: нелега́льный (nelegálʹnyj) — contrary to or forbidden by law
  • Russian: неправоме́рный (nepravomérnyj) — contrary to or forbidden by law
  • Serbo-Croatian: ilegalan — contrary to or forbidden by law
  • Serbo-Croatian: nezakonit — contrary to or forbidden by law
  • Slovak: ilegálny — contrary to or forbidden by law
  • Slovak: nezákonný — contrary to or forbidden by law
  • Spanish: ilegal — contrary to or forbidden by law
  • Swahili: haramu — contrary to or forbidden by law
  • Swedish: olaglig — contrary to or forbidden by law
  • Swedish: illegal — contrary to or forbidden by law
  • Swedish: lagstridig — contrary to or forbidden by law
  • Tatar: яшерен (yäşeren) — contrary to or forbidden by law
  • Thai: ที่ผิดกฎหมาย (Thī̀ p̄hid kḍh̄māy) — contrary to or forbidden by law
  • Turkish: yasa dışı — contrary to or forbidden by law
  • Turkish: illegal — contrary to or forbidden by law
  • Ukrainian: незако́нний (nezakónnyj) — contrary to or forbidden by law
  • Ukrainian: нелега́льний (nelehálʹnyj) — contrary to or forbidden by law
  • Urdu: غیرقانونی (ġairqānūnī) — contrary to or forbidden by law
  • Urdu: ناجائز (nājaiz) — contrary to or forbidden by law
  • Uyghur: قانۇنسىز (qanunsiz) — contrary to or forbidden by law
  • Vietnamese: bất hợp pháp — contrary to or forbidden by law
  • Vietnamese: trái phép — contrary to or forbidden by law
  • Welsh: anghyfreithlon — contrary to or forbidden by law
  • Welsh: anghyfreithiol — contrary to or forbidden by law
  • Azerbaijani: qadağan — prohibited by established rules
  • Bulgarian: забранен (zabranen) — prohibited by established rules
  • Catalan: il·legal — prohibited by established rules
  • Finnish: sääntöjen vastainen — prohibited by established rules
  • Galician: ilegal — prohibited by established rules
  • German: illegal — prohibited by established rules
  • Greek: παράνομος (paránomos) — prohibited by established rules
  • Greek: απαγορευμένος (apagorevménos) — prohibited by established rules
  • Ancient Greek: παράνομος (paránomos) — prohibited by established rules
  • Japanese: 違法の (ihō no) — prohibited by established rules
  • Korean: 반칙의 (banchigui) — prohibited by established rules
  • Northern Kurdish: qedexe — prohibited by established rules
  • Northern Kurdish: memnûh — prohibited by established rules
  • Macedonian: недозволен (nedozvolen) — prohibited by established rules
  • Macedonian: неправилен (nepravilen) — prohibited by established rules
  • Malagasy: raràna — prohibited by established rules
  • Malagasy: voarara — prohibited by established rules
  • Māori: turekore — prohibited by established rules
  • Norwegian Bokmål: ulovlig — prohibited by established rules
  • Portuguese: ilegal — prohibited by established rules
  • Portuguese: proibido — prohibited by established rules
  • Romanian: ilegal — prohibited by established rules
  • Russian: непра́вильный (neprávilʹnyj) — prohibited by established rules
  • Russian: неве́рный (nevérnyj) — prohibited by established rules
  • Spanish: ilegal — prohibited by established rules
  • Swahili: haramu — prohibited by established rules
  • Swedish: förbjuden — prohibited by established rules
  • Swedish: otillåten — prohibited by established rules
  • Polish: nielegał — undercover spy
  • Russian: нелега́л (nelegál) — undercover spy
Real reading context

illegal in complete knowledge articles