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Vibrations transmitted through an elastic solid or a liquid or gas, with frequencies in the approximate range of 20 to 20,000 hertz, capable of being detected by human organs of hearing.
(noun)
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Transmitted vibrations of any frequency.
(noun)
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The sensation stimulated in the organs of hearing by such vibrations in the air or other medium.
(noun)
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Such sensations considered as a group.
(noun)
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A distinctive noise: a hollow sound.
(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.