Definition of «expiration time»

"Expiration time" refers to the specific point or time when something comes to an end or is no longer valid.

At expiration the time premium is zero, and the option either expires worthless or, if it's in the money, is exercised. (borntosell.com)
Every broker offers different types of trading, just as it is with expiration times. (best-binary-options-strategy.com)
However, it works best for those binary options which boasts of longer expiration time periods of 24 hours or more. (best-binary-options-strategy.com)
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