expectation meaning and definition

EXPECTATION noun

Definition of expectation (noun)

1. belief about (or mental picture of) the future
   • synonyms: outlook, prospect
2. anticipating with confidence of fulfillment
   • synonyms: anticipation
3. the feeling that something is about to happen
4. the sum of the values of a random variable divided by the number of values
   • synonyms: arithmetic mean, expected value, first moment