American English

Definition of loud adverb from the Oxford Advanced American Dictionary

      

    loud

     adverb
    adverb
    NAmE//laʊd//
     
    (louder, loudest) (informal)
     
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  1. 1  in a way that makes a lot of noise or can be easily heard synonym loudly
  2. 2 Do 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.
  3. Which Word?loud / loudly / aloud Loudly 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 play any 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.”Idioms
    actions speak louder than words (saying)
     
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    what a person actually does means more than what they say they will do
    for crying out loud (informal)
     
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    used to show you are angry or surprised For crying out loud! Why did you have to do that?
    loud and clear
     
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    in a way that is very easy to understand The message is coming through loud and clear.
    in a voice that can be heard by other people I laughed out loud. Please read the letter out loud. compare aloud
    think aloud/out loud
     
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    to say what your thoughts are as you have them
See the Oxford Advanced Learner's Dictionary entry: loud