Source : Webster's Revised Unabridged Dictionary (1913)

Badly \Bad"ly\, adv.
   In a bad manner; poorly; not well; unskillfully; imperfectly;
   unfortunately; grievously; so as to cause harm; disagreeably;
   seriously.

   Note: Badly is often used colloquially for very much or very
         greatly, with words signifying to want or need.

Source : WordNet®

badly
     adv 1: to a severe or serious degree; "fingers so badly frozen they
            had to be amputated"; "badly injured"; "a severely
            impaired heart"; "is gravely ill"; "was seriously ill"
            [syn: {severely}, {gravely}, {seriously}]
     2: (`ill' is often used as a combining form) in a poor or
        improper or unsatisfactory manner; not well; "he was ill
        prepared"; "it ill befits a man to betray old friends";
        "the car runs badly"; "he performed badly on the exam";
        "the team played poorly"; "ill-fitting clothes"; "an
        ill-conceived plan" [syn: {ill}, {poorly}] [ant: {well}]
     3: evilly or wickedly; "treated his parents badly"; "to steal
        is to act badly"
     4: in a disobedient or naughty way; "he behaved badly in
        school"; "he mischievously looked for a chance to
        embarrass his sister"; "behaved naughtily when they had
        guests and was sent to his room" [syn: {mischievously}, {naughtily}]
     5: with great intensity (`bad' is a nonstandard variant for
        `badly'); "the injury hurt badly"; "the buildings were
        badly shaken"; "it hurts bad"; "we need water bad" [syn: {bad}]
     6: very much; strongly; "I wanted it badly enough to work hard
        for it"; "the cables had sagged badly"; "they were badly
        in need of help"; "he wants a bicycle so bad he can taste
        it" [syn: {bad}]
     7: without skill or in a displeasing manner; "she writes
        badly"; "I think he paints very badly" [ant: {well}]
     8: in a disadvantageous way; to someone's disadvantage; "the
        venture turned out badly for the investors"; "angry that
        the case was settled disadvantageously for them" [syn: {disadvantageously}]
        [ant: {well}, {well}]
     9: unfavorably or with disapproval; "tried not to speak ill of
        the dead"; "thought badly of him for his lack of concern"
        [syn: {ill}] [ant: {well}]
     10: with unusual distress or resentment or regret or emotional
         display; "they took their defeat badly"; "took her
         father's death badly"; "conducted himself very badly at
         the time of the earthquake" [ant: {well}]