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concert pitch

noun
1.
Music. a standard of pitch used for tuning orchestral instruments, usually established at 440 vibrations per second for A above middle C.
2.
a state of heightened eagerness, readiness, or tension:
Spring training had brought the athletes up to concert pitch for the beginning of the season.
Origin
1760-1770
1760-70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for concert pitch

concert pitch

noun
1.
the frequency of 440 hertz assigned to the A above middle C See pitch1 (sense 30), international pitch
2.
(informal) a state of extreme readiness
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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