from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A longitudinal pressure wave of audible or inaudible sound.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. the longitudinal wave of pressure that is transmitted through any plastic material; audible sound.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. (acoustics) a wave that transmits sound


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