The Collaborative International Dictionary of English v.0.48:
Raucous \Rau"cous\ (r[add]"k[u^]s), a. [L. raucus.] Hoarse; harsh; rough; as, a raucous, thick tone. "His voice slightly raucous." --Aytoun. -- Rau"cous*ly, adv. [1913 Webster]WordNet (r) 3.0 (2006):
raucous adj 1: unpleasantly loud and harsh [syn: raucous, strident] 2: disturbing the public peace; loud and rough; "a raucous party"; "rowdy teenagers" [syn: raucous, rowdy]