Source : Webster's Revised Unabridged Dictionary (1913)

Raucous \Rau"cous\, a. [L. raucus.]
   Hoarse; harsh; rough; as, a raucous, thick tone. ``His voice
   slightly raucous.'' --Aytoun. -- {Rau"cous*ly}, adv.

Source : WordNet®

raucous
     adj 1: unpleasantly loud and harsh [syn: {strident}]
     2: disturbing the public peace; loud and rough; "a raucous
        party"; "rowdy teenagers" [syn: {rowdy}]