Etymology From Middle English aloud, a loude (“aloud”), equivalent to a- + loud or a- + loude (“sound”).
1
With a loud voice, or great noise; loudly; audibly.
Try speaking aloud rather than whispering.
Then we relapsed into a discomfited silence, and wished we were anywhere else. But Miss Thorn relieved the situation by laughing aloud, and with such a hearty enjoyment that instead of getting angry and more mortified we began to laugh ourselves, and instantly felt better.1897 December (indicated as 1898), Winston Churchill, chapter V, in The Celebrity: An Episode, New York, N.Y.: The Macmillan Company; London: Macmillan & Co., Ltd., →OCLC:
2
Audibly, as opposed to silently/quietly.
speaking aloud rather than thinking thoughts privately
He read the letter aloud. Sophia listened with the studied air of one for whom, even in these days, a title possessed some surreptitious allurement.1921, Ben Travers, chapter 1, in A Cuckoo in the Nest, Garden City, N.Y.: Doubleday, Page & Company, published 1925, →OCLC: