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vi·brate (vībrāt)
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v. vi·brat·ed, vi·brat·ing, vi·brates
v.intr.
1.
a. To move back and forth or to and fro, especially rhythmically and rapidly: The eardrum vibrates in response to sound waves. See Synonyms at swing.
b. To progress in a given direction while moving back and forth rapidly: The sound wave vibrated through the water.
2. To be in a state of great activity, excitement, or agitation: "Even as the film moved ... to the more deadly fields of Vietnam, old hatreds vibrated in me" (Loudon Wainwright).
3. To produce a sound; resonate: "The noise of cars and motorcycles, voices and music vibrates from the street" (Edmundo Paz Solden).
4. To fluctuate or waver, as between states or in making choices: "The fear of repetition and the lure of repetition: these are the two poles between which the movie vibrates" (Wendy Lesser).
v.tr.
1. To cause to move back and forth rapidly: The rattlesnake vibrated its tail.
2. To produce (sound) by vibration.
n.
A setting on a cell phone that causes the phone to shake rapidly without producing a ringtone when a call or text message is received.

[Latin vibrāre, vibrāt-; see weip- in the Appendix of Indo-European roots.]

vibra·tive, vibra·tory (-brə-tôrē) adj.

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2017 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 

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