Definition of timing
1a
: placement or occurrence in time
the timing of the sale couldn't have been better
b
: the ability to select the precise moment for doing something for optimum effect
a boxer with impeccable timing
2
: observation and recording (as by a stopwatch) of the elapsed time of an act, action, or process
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Merriam-Webster unabridged
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The first known use of timing was circa 1659
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