Definition of roars:
(v) :
Of animals (especially a lion), to make a loud deep noise.
(v) :
(intransitive) To make a loud, deep cry, especially from pain, anger, or other strong emotion.
(n) :
A long, loud, deep shout, as of rage or laughter, made with the mouth wide open.
(n) :
The cry of the lion.
(v) :
To laugh in a particularly loud manner.
(v) :
(transitive) To cry aloud; to proclaim loudly.