Having, making, or being a strong or great sound; noisy; striking the ear with great force; as, a loud cry; loud thunder.(adjective)
source: webster1913
adverb (r)
with relatively high volume(adv.all)
Example: 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.