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1. Belief about (or mental picture of) the future
   - outlook, prospect
    
2. The feeling waiting to something happening, esp. looking forward with excitement
   - anticipation
    
3. The feeling that something is about to happen
    
4. (statistics) the sum of the values of a random variable divided by the number of values
   - arithmetic mean, first moment, expected value

Derived forms: expectations

Type of: belief, feeling, hopefulness, mean, mean value

Encyclopedia: Expectation