illegal

IPA: ɪɫˈigʌɫ

(obsolete) An illegal act or technique.
(colloquial, in the plural, as illegals) Contraband, esp. illegal substances such as drugs.
(colloquial, offensive) An illegal immigrant.
(espionage) A spy working abroad illegally and undercover, without visible ties to his or her country’s authorities.

Contrary to or forbidden by law, especially criminal law.
Breaching certain enacted statutes of positive law; not lawful, not legal (cf. immoral, unethical)
Forbidden by established rules.
(philately, of an issue printed for collectors) Totally fictitious, and often issued on behalf of a non-existent territory or country.
(of a person, sometimes offensive) Being or doing something illegally.
(chiefly US, sometimes offensive) Being an illegal immigrant; residing in a country illegally.

Examples of "illegal" in Sentences

For those entering illegally, the term illegal immigrant is preferred.
One-size-fits-all criminal label What's more, the term "illegal immigrant" is imprecise.
Amnesty supporters refuse to use the term illegal aliens, preferring instead undocumented aliens.
I think the word "illegal" which is part of the term illegal alien, justify's the Sheriff's actions.
Three years ago, he said the term "illegal immigrant" should not be used, arguing that "being in this country without documentation is not a crime."
Calling illegal immigrants 'undocumented workers' does not lessen the fact that they are * illegal*, that they have broken our laws and should be treated as such.
In terms of language, one of the toughest battles today is over the widespread use of the term "illegal immigrant," made popular by conservatives in an attempt to dehumanize undocumented immigrants.
A campaign run by the always-chingón Applied Research Center publishers of the even-more-chingón magazine, Colorlines is seeking that everyone stop using the term "illegal" outright, or at the least resort to using the awkward I-word stand-in.