legally

from WordNet (r) 3.0 (2006)

legally
    adv 1: by law; conforming to the law; "we are lawfully wedded
           now" [syn: {legally}, {lawfully}, {de jure}] [ant:
           {unlawfully}]
    2: in a legal manner; "he acted legally"

from The Collaborative International Dictionary of English v.0.48

Legally \Le"gal*ly\, adv.
   In a legal manner.
   [1913 Webster]