- Confidence
- Established
- Formation
- Borrowing
- First attested
- 1538
- Borrowed from
- French illégal
- Ultimate origin
- Medieval Latin (illegālis)
Pronunciation
- IPA: /ɪˈliː.ɡəl/[1]
Etymology
It is borrowed from French illégal or directly from Medieval Latin illegālis,[2][3][4] from Latin il-, the assimilated form of in- (“not”), and lēgālis (“legal”).[2][3] It is related to legal and illegality.[2][3]
Earliest recorded meaning
Contrary to law: 1626 in the OED and Barnhart,[5][3] the 1630s in Etymonline;[2] Merriam-Webster dates it to 1538.[6]
Semantic evolution
Illegally is from the 1620s[2] and illegality from 1639.[3] Illegal immigrant is recorded by 1892 in American English, and illegal immigration from 1887;[2] in British use from the late 1930s it was applied to Jews entering Palestine.[2][5] The noun, an illegal immigrant, is from 1939,[5][6] and a Soviet secret agent working abroad without diplomatic cover from 1968.[5] In computing it means unacceptable to a program.[7] The Century Dictionary held that it implies a real breach of law, not a mere irregularity of procedure.[2]
Timeline
- 1538 – first known use.[6]
- 1626 – contrary to law.[5][3]
- 1639 – illegality.[3]
- 1892 – illegal immigrant.[2]
- 1939 – noun, an illegal immigrant.[5]
- 1968 – a Soviet agent.[5]
Modern meaning
Adjective
- Forbidden by law; unlawful.
- Against the official rules, as of a game.
- In computing, not acceptable to or performable by a program.
Noun
- (informal) An illegal immigrant.
Word family
- illegally
- illegality
- illegalize
- illegal alien
Related words
- legal
- illicit
- legitimate
- loyal
References
- ^ Jones, Daniel (2011), Cambridge English Pronouncing Dictionary, 18th ed., ed. Peter Roach, Jane Setter and John Esling, Cambridge: Cambridge University Press
- ^ a b c d e f g h i Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
- ^ a b c d e f g Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
- ^ Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
- ^ a b c d e f g Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
- ^ a b c Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
- ^ The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin
Related etymologies
- positive · also from Latin
- significant · also from Latin
- regular · also from Latin
- opinion · also from Latin
- stupid · also from Latin
- necessary · also from Latin
- direct · also from Latin
- commission · also from Latin
Cite this entry
“Illegal.” Etymologically, 15 Oct. 2026, etymologically.com/en/illegal. Accessed 15 Oct. 2026.
Last edited on . ·