loud
adverb
laʊd 
laʊd Synonym
loudlyDo you have to play that music so loud?You'll have to speak louder—I can't hear you.She screamed loud enough to wake the dead.Idioms
loud and clear
in a way that is very easy to understand
The message is coming through loud and clear.
out loud
in a voice that can be heard by other people
I laughed out loud.Please read the letter out loud. compare aloud
Usage note: loud / loudly / aloudLoudly is the usual adverb from the adjective loud: The audience laughed loudly at the joke.Loud is very common as an adverb in informal language. It is nearly always used in phrases such as loud enough, as loud as or with too, very, so, etc: Don’t play your music too loud. ◇ I shouted as loud as I could.Louder is also used in informal styles to mean ‘more loudly’: Can you speak louder?Out loud is a common adverb meaning ‘so that people can hear’: Can you read the letter out loud? ◇ He laughed out loud at his own joke. Aloud has the same meaning but is fairly formal. It can also mean ‘in a loud voice’.