Source : Webster's Revised Unabridged Dictionary (1913)

Soundly \Sound"ly\, adv.
   In a sound manner.

Source : WordNet®

soundly
     adv 1: deeply or completely; "slept soundly through the storm"; "is
            sound asleep" [syn: {sound}]
     2: in a complete and thorough manner (`good' is sometimes used
        informally for `thoroughly'); "he was soundly defeated";
        "we beat him good" [syn: {thoroughly}, {good}]