unlawfully

from WordNet (r) 3.0 (2006)

unlawfully
    adv 1: not conforming to the law; "they were unlawfully married"
           [ant: {de jure}, {lawfully}, {legally}]

from The Collaborative International Dictionary of English v.0.48

Unlawful \Un*law"ful\, a.
   Not lawful; contrary to law. -- {Un*law"ful*ly}, adv. --
   {Un*law"ful*ness}, n.
   [1913 Webster]

   {Unlawful assembly}. (Law) See under {Assembly}.
      [1913 Webster]

from Bouvier's Law Dictionary, Revised 6th Ed (1856)

UNLAWFULLY, pleadings. This word is frequently used in indictments in the 
description of the offence; it is necessary when the crime did not exist at 
common law, and when a statute, in describing an offence which it creates, 
uses the word, 1 Moody, Cr. Cas. 339; but it is unnecessary whenever the 
crime existed at common law, and is manifestly illegal. 1 Chitty, Crim. Law, 
*241; Hawk. B. 2, c. 95, s. 96; 2 Roll. Ab. 82; Bac. Abr. Indictment, G 1 
Cro. C. C. 38, 43.