Definition of expectation
1
: the act or state of expecting : anticipation
in expectation of what would happen
2a
: something expected
not up to expectations expectations for an economic recovery
b
: basis for expecting : assurance
they have every expectation of success
c
: prospects of inheritance
—usually used in plural
3
: the state of being expected
4a
: expectancy sense 2b
b
: expected value
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Merriam-Webster unabridged
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Time Traveler for expectation
The first known use of expectation was in 1540
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