Definition of "resonator" [res•o•na•tor]

• A resonating system. (noun)
• A hollow chamber or cavity with dimensions chosen to permit internal resonant oscillation of electromagnetic or acoustical waves of specific frequencies. (noun)
• A resonant circuit. (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.

• "Instead of a cylinder, he built a resonator from a quarter-inch-diameter hollow steel tube bent to form a ring about 1.3 inches across."
• "A typical resonator is a very tiny cantilever that can be made to vibrate up and down."
• "In their recently released book entitled Tuned In, authors Craig Stull, Phil Myers, and David Meerman Scott describe a process for creating what they refer to as a resonator, a product or service that practically sells itself by solving specific problems for buyers."