Source : Webster's Revised Unabridged Dictionary (1913)

Aloud \A*loud"\, adv. [Pref. a- + loud.]
   With a loud voice, or great noise; loudly; audibly.

         Cry aloud, spare not, lift up thy voice. --Isa. lviii.
                                                  1.

Source : WordNet®

aloud
     adv 1: using the voice; not silently; "please read the passage
            aloud"; "he laughed out loud" [syn: {out loud}]
     2: with relatively high volume; "the band played loudly"; "she
        spoke loudly and angrily"; "he spoke loud enough for those
        at the back of the room to hear him"; "cried aloud for
        help" [syn: {loudly}, {loud}] [ant: {softly}]