- expectation of life,
- expectation sunday,
- expectation week,
- expected frequency
Origin of expectation
- the numerical probability that an event will occur
- another term for expected value
1530s, from Middle French expectation (14c.) or directly from Latin expectationem/exspectationem (nominative expectatio/exspectatio) "anticipation, an awaiting," noun of action from past participle stem of expectare/exspectare (see expect). Related: Expectations.