Criminal | Definition of Criminal by Merriam-Webster
Merriam-Webster › dictionary › criminal
1 : being or guilty of an act that is unlawful, foolish, or wrong.
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1 up, 8y
The dictionary is imprecise. An act can be unlawful without the actor being criminal. We have an entire court system for these sorts of acts.
See also: http://blogs.findlaw.com/blotter/2014/07/is-illegal-immigration-a-crime-improper-entry-v-unlawful-presence.html